CBSE > Class 10 > Mathematics | CBSE Board | Homework Help

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Rita was studying in class 9th C of St. Surya Public School, Mohali, New Delhi-110030. Once Ranjeet and his daughter Rita were returning after attending teachers' parent meeting at Rita's school. As the home of Ranjeet was close to the school so they were coming by walking. Rita asked her father, "Daddy how old are you?" Ranjeet said, "At present, sum of ages of both of us is 55 years and after 10 years my age will be double of you."

Posted by Son Sammy 1 year, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Akshra Garg 1 year, 2 months ago

If we let the present age of rita father's is x and rita's age is y.Then x+y=55 x+10=2(y+10) x+10=2y+20 x-2y=10 By elimination method 3y=45 y=15 x+15=55 x=40

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Prove that 3+2√5 is irrational?

Posted by Vaishali Doultani 1 year, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Nitika Arya 1 year, 2 months ago

Use app Login Class 10 >>Maths >>Real Numbers >>Revisiting Irrational Numbers >>Prove that 3 + 2√(5) is irrational. Question Prove that 3+25 is irrational. Medium Open in App Updated on : 2022-09-05 Solution Verified by Toppr Prove 3+25 is irrational. → let take that 3+25is rational number → so, we can write this answer as ⇒3+25=ba Here a & b use two coprime number and b=0. ⇒25=ba−3 ⇒25=ba−3b ∴5=2ba−3b Here a and b are integer so 2ba−3b is a rational number so 5 should be rational number but 5 is a irrational number so it is contradict - Hence 3+25 is irrational.

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To conduct sports day activities,in your

Posted by Ishreth Zainaba C.I 1 year, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Akshra Garg 1 year, 2 months ago

Please tell us the full question

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Graphically the pair of equations given by 3x-3y+10=0 , 2x-3y+9=0 represents which two lines they are

Posted by Samridhi Lakhanpal 1 year, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Tirthankar Pan 1 year, 2 months ago

Intersecting lines

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Aditya Kumar 1 year, 2 months ago

Intersecting lines

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E is a point on the side AD produced of a parallelogram and BE intersect CD at F show that traingle ABE is similar to triangle CFB

Posted by Jessica Singh 1 year, 2 months ago

CBSE > Class 10 > Mathematics

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The sum of third and second term of ap is 30 and seventh term exceeds by fourth term by 14 find ap

Posted by Navleen Kaur 1 year, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Akshra Garg 1 year, 2 months ago

a+2d+a+d=30 2a+3d=30 a+6d=a+3d+14 3d=14 d=14/3 2a+14=30 2a=16 a=8 Now you can form your ap

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Find the quadratic polynomial whose sum of zeroes is √5 and product of zeroes is 10

Posted by Shivani Choudhary 1 year, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Akshra Garg 1 year, 2 months ago

x²-(sum of zeroes)x+product of zeroes x²-√5+10 is your quadratic polynomial

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Aman Jaiswal 1 year, 2 months ago

x²—√5x + 10

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8/root3⅝

Posted by Vaibhav Kumar Jha 1 year, 2 months ago

CBSE > Class 10 > Mathematics

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X+y=10 x-y=4

Posted by Harsha P N 1 year, 2 months ago

CBSE > Class 10 > Mathematics

5 answers

Anuj Jangid 1 year, 1 month ago

X+Y=10 => X=10-Y ------(1) X-Y=4-------(2) From equation 1st and 2nd, 10-Y-Y=4 => -2Y=4-10 => -2Y=-6 => Y=6/2 => Y=3 Put Y=3 in equation 1st :- => X=10-3 => X=7 That's your answer.

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Aditya Kumar 1 year, 2 months ago

X = 7, y=3

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Vaibhav Kumar Jha 1 year, 1 month ago

Elementary method

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Rk Yadav 1 year, 2 months ago

X=7,Y=3

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Pandit . 1 year, 2 months ago

X+y=10 X-y=4 X=6 X+y=10 6+y=10 Y=10-6 Y=4

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If two vertices of an equilateral triangle are(0,0) ,(3 √3) .find third vertex

Posted by Shreyal Malunjkar 1 year, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Akshra Garg 1 year, 2 months ago

Let 3rd vertex is x,y So,√(x²+y²)=√(x-3)²+(y-√3)² You will get your 3rd vertex

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4/x + 3y = 14 , 3/x - 4y = 23

Posted by Poojitha Pooja 1 year, 2 months ago

CBSE > Class 10 > Mathematics

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Determine AP whose third term is 5 and 7th term is 9

Posted by Rahul Malik 1 year, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Zaima Anjum 1 year, 2 months ago

GIVEN a3=5 => a+2d=5____[1] a7=9 =>a+6d=9_____[2] subtract eqn[2] from eqn[1] -4d=-4 d=4/4 d=1 put d=1 in eqn[1] a+2[1]=5 a=5-2 a=3 now AP is 3,4,5........

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Venu Gopal has twice as many sisters as he has brothers. if Shobha, Venu's sister has the same number of brother as she has sisters, than find the number of brothers of Shobha.

Posted by Suryansh Sirohi 1 year, 2 months ago

CBSE > Class 10 > Mathematics

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2Sin²A-cosA=2

Posted by Abhishek Kumar 1 year, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Abhishek Kumar 1 year ago

2sin²A-cosA=2 2(1-cos²A) -cos=2 2-2cos²A-cosA=2 -cosA(Cos-1) =0 -cosA=0 -cosA=cos90 A=90°

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Suryansh Sirohi 1 year, 2 months ago

Something is incorrect in your question.

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1 plus sin A minus cos A divided by 1 plus sin A plus cos A

Posted by Nandana Menon 1 year, 2 months ago

CBSE > Class 10 > Mathematics

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Sides AB and AC and the median AD of a triangle ABC are respectively proportional to sides PQ and PR and the median PM of another triangle PQR. Show that Triangle ABC~Triangle PQR.

Posted by Krishna Pathak 1 year, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Lallu Tomar 1 year, 2 months ago

Qusan 1

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Ashish Mandal 1 year, 2 months ago

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A car has wheels which are 80cm in diameter. How many compete revolution does each wheel make in 10 minutes when the car is travelling at a speed of 66km per hour?

Posted by Muneeba Ahmar 1 year, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Nishant Singh 1 year, 2 months ago

4375

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A medicine capsule is in the shape of a cylinder with two hemisphere stuck to each of its and the length of the entire capsule is 14 mm and the diameter of the capsule is 5 mm find the surface area

Posted by Aakanksha Jha 1 year, 2 months ago

CBSE > Class 10 > Mathematics

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Find the point on the x-axis which is equidistant from (2, – 5) and (- 2, 9)

Posted by Shubhpreet Singh 1 year, 2 months ago

CBSE > Class 10 > Mathematics

3 answers

Lallu Tomar 1 year, 2 months ago

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Astha Gautam 1 year, 2 months ago

X ki value - 7 by the distance formula

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Samrat Rajput 1 year, 2 months ago

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Sample paper maths 2023 24 in Hindi medium basic

Posted by Tap Tap 1 year, 2 months ago

CBSE > Class 10 > Mathematics

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The sides of two similar triangles are in the ration 4:7 . The ratio of their perimeter is

Posted by Sampriti Yadav 1 year, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Nishant Sahu 1 year, 2 months ago

As we know that , Perimeter of Tri. ABC/ Perimeter of Tri. DEF =corresponding side AB / corresponding side DE Therefore the perimeter of two similar sides of triangle is same as the ratio of similar sides.

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If vertices of a parallelogram pqrs taken in order are P(3,4) Q(-2,3) and R(-3,-2) then the coordinate of it,s 4 vertices are

Posted by Remya Ks 1 year, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Sahana Parashetti 1 year, 2 months ago

Apply section formula let s (x,y) in parallelogram draw PS diagonal give intersect point as o let m1 is m2 is 1

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Prove that: (1/cosA - cosA) (1/sinA - sinA) = 1/tanA + cotA

Posted by Mubeen Ali Navrozy 1 year, 2 months ago

CBSE > Class 10 > Mathematics

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Rangoli is in the shape of square marked as ABCD, side of square being 40 cm a square, a quadrant of circle of radius 10 cm is drawn (in which diyas are kept). Also a circle of diameter 20 cm is drawn inside the square. i) What is the area of square ABCD? ii) Find the area of the circle. iii) If the circle and the four quadrants are cut off from the square area of remaining portion of square ABCD. ABCD and removed, then find the (OR) Find the combined area of 4 quadrants and the circle, removed.

Posted by Sai Upasana 1 year, 1 month ago

CBSE > Class 10 > Mathematics

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I wanna ask that chapter wise which topic is important

Posted by Ayushi Yadav 1 year, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Mayank Sharma 1 year, 1 month ago

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Which term of the AP 5,9,13,17,.....is 81?

Posted by Aishwarya Chaudhary 1 year, 2 months ago

CBSE > Class 10 > Mathematics

3 answers

M Charith 1 year, 1 month ago

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Saksham Acharya 1 year, 2 months ago

Let nth term of the give AP be 81 a + (n-1) d = 81 5 + (n-1) 4 = 81 (n-1) 4 =81-5 (n-1) =76/4 n-1 =19 n =19+1 n =20 Therefore 20th term of the given AP is 81

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Ayesha Killedar 1 year, 2 months ago

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