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

i)let x be the distance travelled by boat Angle of depression =30 degree Tan 30°=240/x 1/root 3=240/x x=240 root 3 Therefore distance travelled by boat is 240 root 3 m. ii) now angle of depression let be theta Distance of boat is reduced by 240(root3-1)m Let new distance travelled by boat be y Difference in distance is given Earlier distance - new distance =difference i.e 240root3 - y = 240(root 3-1) We get y=240 Tan theta =opp/adjacent Tan theta=240 i.e height of tower/ 240 i.e distance travelled Tan theta=1 Tan theta = Tan 45° Therefore theta=45° Hence the new angle of depression is 45 degree https://photos.app.goo.gl/3dosPnoJ2sT1j8AF8 ( corresponding figure u can check here??)

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Make a labelled figure on the basis of the given information and calculate the distance of the boat from the foot of the observation tower. 2 After 10 minutes, the guard observed that the boat was approaching the tower and its distance from tower is reduced by 240( - 1) m. He immediately raised the alarm. What was the new angle of depression of the boat from the top of the observation tower?

Posted by Swati Dahiya 3 years, 9 months ago

CBSE > Class 10 > Mathematics

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Two water taps together fill a tank in 17 hours. The tap with longer diameter takes 2 hours less than the tap with smaller one to fill the tank separately. Find the time in which each tap can fill the tank separately.

Posted by Manthan Srivastava 3 years, 9 months ago

CBSE > Class 10 > Mathematics

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Two tangent TP and TQ are drawn to a circle with centre O from an external point T at P and Q. Prove that ∠PTQ=40, then find ∠OPQ

Posted by Samarth Prachande 3 years, 9 months ago

CBSE > Class 10 > Mathematics

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Two tangent TP and TQ are drawn to a circle with centre O from an external point T at P and Q. Prove that ∠PTQ=40 ∠OPQ

Posted by Samarth Prachande 3 years, 9 months ago

CBSE > Class 10 > Mathematics

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tan²A+cot²A+2=secA+cosec²A

Posted by Henil Patel 3 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Arun😉 Saini 3 years, 9 months ago

bhai term 2 me trigonometry nahi aa rahi ....

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A metric progression

Posted by Ruchi Kumari 3 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Deepak Rajput 3 years, 9 months ago

Arithmetic progression

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Exercise 5.4 solution

Posted by Ruchi Kumari 3 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Mohit Gemini Mohit Gemini 3 years, 9 months ago

Search from Google bro

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In the given figure, BO and CO are bisector of /B and /C respectively . If /A = 50 , then /BOC=?

Posted by Sachin Singh 3 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Isha Kumari Alisha 3 years, 9 months ago

BOC=115

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In the given figure O is the centre of the circle of radius 5 cm. T is a point such that OT = 13 cm and OT intersect the circle at E. If AB is the tangent to the circle at E , find the length of AB.

Posted by N C 3 years, 9 months ago

CBSE > Class 10 > Mathematics

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Budding

Posted by Prachi 2005 3 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Tamanna Sharma 3 years, 9 months ago

A small part of body of parent organism grow out as a bud which became new organism.example hydra

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12 solid spheres of same size are made by melting a solid metallic cylinder of base radius 1cm and height 1/3 of 48cm. Find the radius of each sphere

Posted by Anmolpreet Kaur 3 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Aditya Singh 3 years, 9 months ago

R= 1

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4x2-2(a2+b2)x+a2b2=0

Posted by Gssydu Ogkvkg 3 years, 10 months ago

CBSE > Class 10 > Mathematics

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2 cubes each of volume 64cm^3 are joined end to end . Find the surface area of the resulting cuboid

Posted by Rimjhim Rai 3 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Shivam Kumar Gupta 3 years, 9 months ago

80cm^3

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Find the roots of equations x²-3x-10=0

Posted by 44Uday Shinde10E 3 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Chhavi Soni 3 years, 9 months ago

-2 and 5

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Jeet Dutta 3 years, 10 months ago

x² - 3x - 10 = 0 => x² - (5 - 2)x - 10 = 0 => x² - 5x + 2x - 10 = 0 => x(x - 5) + 2(x - 5) = 0 => (x - 5)(x + 2) = 0 x - 5 = 0 or x + 2 = 0 => x = 5 or => x = - 2 Roots are 5, - 2

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Two chords AB and CD of lengths 5 cm and 11 cm respectively of a circle are parallel to each other and are on opposite sides of its centre. If the distance between AB and CD is 6 cm, find the radius of the circle.

Posted by Lakshay Verma 3 years, 10 months ago

CBSE > Class 10 > Mathematics

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Ex 4.2 Q1

Posted by Vinay Sawlecha 3 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Rahul Yadav Rahul Yadav 3 years, 10 months ago

Factorisation

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Rahul Yadav Rahul Yadav 3 years, 10 months ago

x=-5,2

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Marks obtained out of 50 by 100 to student in physics test are given in the frequency table below Marks : 15 20 22 24 25 30 33 38 45 Frequency :5 8 11 20 23 18 13 3 1 Find the mean

Posted by Vivek Rana 3 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Kriti Kumari 3 years, 10 months ago

Answer:- Marks (x) Frequency (f) fx 155 75 208 160 2211 242 2420 480 2523575 3018 540 3313 429 283 84 45145 Σf=5+8+11+20+23+18+13+3+1 =102 Σfx=75+160+242+480+575+540+429+84+45 =2630Average mark(xˉ)=ΣfΣfx=1022630=25.78

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derive the formula for the sum of first n terms of ap,whose first term is a and the common difference is d.

Posted by Tanuja Chavan 3 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Sia ? 3 years, 10 months ago

The sum of arithmetic progression whose first term is a and the common difference is d can be calculated using one of the following formulas: S_n = n/2 (2a+(n−1)d) and S_n = n/2 (a₁+a_n). The sum of AP of n natural numbers is n(n+1)/2.

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Kishan Kishan Nm 3 years, 10 months ago

999

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Show that x = -3 is the solution of the equation x2 +6x +9 = 0.

Posted by Kartik Jaat 3 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 3 years, 10 months ago

x² + 6x + 9 = 0.

Put x = -3 in the equation
{tex}\Rightarrow{/tex}{tex}(-3)^2 + 6(-3) + 9{/tex}
{tex}\Rightarrow{/tex} {tex}9 - 18 + 9 =0{/tex}
Hence, it is a solution of the given equation.

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what is culminative frequency?

Posted by Avnish Gawande 3 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Asad Saifi 3 years, 10 months ago

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Show that any positive odd integer is of the form 6q +1 0r 6q +3 or 6q +5.where q is some integer

Posted by Zeyea Akhun 3 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

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Draw a line segmemt of length 8.4 cm and dinde it in ratio 4:7 mesure the two part

Posted by Rita Kashyap 3 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

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I want PT 2 question paper of class 10th

Posted by Vedika Kengale 3 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

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A2 + b2

Posted by Saurabh Singh 3 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Daksh Rajoriya 3 years, 10 months ago

Ab²

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Check whether the following is a equation or not. (x²+1)(x+1)= (x+3)²

Posted by Shalini Shalini 3 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Neelam Kumari 3 years, 10 months ago

X(x²+1)+1(x²+1) =||+X³+X+x²+1=(x+3)² =||As it is=x²+3³+2(x)(3) =|| ""=X²+9+6x X³+X+x²+1==X²+9+6x{x² cancel by x²}__{+1-9=-8}_{x-6x=-5x} Then the left equation will be X³-5x-8=0 And degree of equations is highest power of equations And here the highest power is 3 ,so it is cubic equations not quadratic equations

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Paras Yadav 3 years, 10 months ago

No, because xcube -5x -8

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Two circles touch each other internally . Prove that the tangents drawn to the two circles from any point on the common tangent are equal in length

Posted by Mihir Panara 3 years, 10 months ago

CBSE > Class 10 > Mathematics

3 answers

Neelam Kumari 3 years, 10 months ago

U can get help by our latest worksheet of 2021 of this chap

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Priya . 3 years, 10 months ago

From A, AB and AC are are two tangents to the circle with center C Therefore, AB = AO.....(equation ii) also From A, AC and AO are are two tangents to the small circle. Therefore, AC = AO...(equation ii) From Equation i and ii We have AB = AC Hence proved!!

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Mihir Panara 3 years, 10 months ago

Pleas ans

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