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Ask QuestionPosted by Hema S B 4 years, 9 months ago
- 0 answers
Posted by Tanhaji Jadhav 4 years, 9 months ago
- 1 answers
Yogita Ingle 4 years, 9 months ago
AB = Height of tower
BC = 30 m
∠ACB = 30°
InΔABC
Hence The height of tower is 17.320 m
Posted by Kunal Kushwah 4 years, 9 months ago
- 1 answers
Yogita Ingle 4 years, 9 months ago
Given :
To Find : solve using substitution method
Solution :
-----1
------2
Substitute the value of x from 1 in 2
So, x = 2 and y = 3
Posted by Manya Mahajan 4 years, 9 months ago
- 4 answers
Manya Mahajan 4 years, 9 months ago
Posted by Mukesh Kumar Gouda 4 years, 9 months ago
- 1 answers
Yogita Ingle 4 years, 9 months ago
Step 1: Draw a line segment AB of length 7.6 cm.
Step 2: Draw any ray AX, making an acute angle with AB.
Step 3: Locate 13 ( = m + n ) points on AX so that
Step 4: Join
Step 5: Through the point ( m = 5 ) , draw a line parallel to
( by making an angle equal to
) at
intersecting AB at the point C.
So, we get
⇒ AC : CB = 5 : 8
⇒ AC = 2.9 cm and CB = 4.7 cm
Posted by Anish Singh 4 years, 9 months ago
- 1 answers
Manya Mahajan 4 years, 9 months ago
Posted by Amisha Luhach ??? Luhach 4 years, 9 months ago
- 5 answers
Posted by Gireesh Bhagwat 4 years, 9 months ago
- 2 answers
King Adithya H M... 4 years, 9 months ago
Anmol Agarwal 4 years, 9 months ago
Posted by Vrisag Patel 4 years, 9 months ago
- 1 answers
Manya Mahajan 4 years, 9 months ago
Posted by Vikrant Sheoran 4 years, 9 months ago
- 2 answers
Posted by Supriya Mishra 4 years, 9 months ago
- 1 answers
Ambika Ambika 4 years, 9 months ago
Posted by Pratik Bista 4 years, 9 months ago
- 1 answers
King Adithya H M... 4 years, 9 months ago
Posted by Adiy Vindhani 4 years, 9 months ago
- 2 answers
Yogita Ingle 4 years, 9 months ago
an=a+(n−1)d
a3=4=a+2d ....(1)
a9=−8=a+8d ....(2)
∴4−2d=−8d−8
−2d+8d=−8−4
6d=−12
d=−2
a=4−2d
=4+4=8
an=0,a=8,d=−2
0=8+(n−1)×(−2)
0=8−2n+2
2n=10
n=5
Posted by Adiy Vindhani 4 years, 9 months ago
- 2 answers
Yogita Ingle 4 years, 9 months ago
The first 3-digit number which is divisible by 7 is 105
The last 3-digit number which is divisible by 7 is 994
The list of 3-digit numbers divisible by 7 are
105, 112, 119,…..994 which forms an A.P
Consider a formula
T(n) = a + (n – 1)d
Where
a = 105
d = 7
T(n) = 994
994 = 105 + (n – 1)7
889 = 7n – 7
7n = 896
n = 128
∴ There are 128 3-digits number which are divisible by 7.
King Adithya H M... 4 years, 9 months ago
Posted by Ambika Ambika 4 years, 9 months ago
- 2 answers
Sumaila Ali Choudhary??? 4 years, 9 months ago
Posted by Monika Moni 4 years, 9 months ago
- 1 answers
Yogita Ingle 4 years, 9 months ago
Step 1: Draw segment AB of length 7.6 cm using a ruler.
Step 2: Draw a ray AC having an acute angle with line AB.
Step 3: Mark 13 equidistant points on ray AC, A1,A2,A3,...,A13
Step 4: Join A13 to B
Step 5: Draw A5P parallel to A13B.
Point P divides AB in the ratio 5:8. Measuring the lengths, we get AP=2.9 cm and PB=4.7 cm.
Posted by Mehrose Naxir 4 years, 10 months ago
- 1 answers
Yogita Ingle 4 years, 10 months ago
Factorise 3825 as follows:
3825=3×3×5×5×17=32×52×17
Since, 3,5 and 17 are prime numbers as these are the numbers that are only divisible by themselves.
Hence, 3825=32×52×17
Posted by Siddhi Pateriya 4 years, 10 months ago
- 0 answers
Posted by Bapana Sahithi 4 years, 10 months ago
- 1 answers
King Adithya H M... 4 years, 10 months ago
Posted by Meraj Alam 4 years, 10 months ago
- 0 answers
Posted by Harshit Trivedi 4 years, 10 months ago
- 1 answers
Gaurav Seth 4 years, 10 months ago
Let a is the first term and d is the common difference .
(m - n) = -2a(m-n)/2 -(m-n)(m+n)/2+(m-n)d/2
1 = -2a/2 - (m+n)/2 + d/2
1 = -1/2 {2a + (m+n-1)d} ---------(1)
from equation (1)
S_{m+n} = -(m+n)
Posted by Meraj Alam 4 years, 10 months ago
- 2 answers
Gaurav Seth 4 years, 10 months ago
Solution:
LHS =
Divide numerator and denominator by cosQ , we get
=
=
/* By Trigonometric identity:
Sec²Q-tan²Q = 1 */
=
=
=
=
After cancellation, we get
=
Multiply numerator and denominator by (secQ-tanQ), we get
=
=
=
= RHS
Posted by Piyush Kaushik 4 years, 10 months ago
- 0 answers
Posted by Alisha. Afreen 4 years, 10 months ago
- 2 answers
Gaurav Seth 4 years, 10 months ago
The radius of 1st circle, r1 = 21/2 cm (as diameter D is given as 21 cm)
So, area of gold region = π r12 = π(10.5)2 = 346.5 cm2
Now, it is given that each of the other bands is 10.5 cm wide,
So, the radius of 2nd circle, r2 = 10.5cm+10.5cm = 21 cm
Thus,
∴ Area of red region = Area of 2nd circle − Area of gold region = (πr22−346.5) cm2
= (π(21)2 − 346.5) cm2
= 1386 − 346.5
= 1039.5 cm2
Similarly,
The radius of 3rd circle, r3 = 21 cm+10.5 cm = 31.5 cm
The radius of 4th circle, r4 = 31.5 cm+10.5 cm = 42 cm
The Radius of 5th circle, r5 = 42 cm+10.5 cm = 52.5 cm
For the area of nth region,
A = Area of circle n – Area of circle (n-1)
∴ Area of blue region (n=3) = Area of third circle – Area of second circle
= π(31.5)2 – 1386 cm2
= 3118.5 – 1386 cm2
= 1732.5 cm2
∴ Area of black region (n=4) = Area of fourth circle – Area of third circle
= π(42)2 – 1386 cm2
= 5544 – 3118.5 cm2
= 2425.5 cm2
∴ Area of white region (n=5) = Area of fifth circle – Area of fourth circle
= π(52.5)2 – 5544 cm2
= 8662.5 – 5544 cm2
= 3118.5 cm2
Posted by Kratagya Rathore 4 years, 10 months ago
- 2 answers
Yogita Ingle 4 years, 10 months ago
Two vertices of an equilateral triangle are (0, 0) and (3, √3).
Let the third vertex of the equilaterla triangle be (x, y)
Distance between (0, 0) and (x, y) = Distance between (0, 0) and (3, √3) = Distance between (x, y) and (3, √3)
√(x2 + y2) = √(32 + 3) = √[(x - 3)2 + (y - √3)2]
x2 + y2 = 12
x2 + 9 - 6x + y2 + 3 - 2√3y = 12
24 - 6x - 2√3y = 12
- 6x - 2√3y = - 12
3x + √3y = 6
x = (6 - √3y) / 3
⇒ [(6 - √3y)/3]2 + y2 = 12
⇒ (36 + 3y2 - 12√3y) / 9 + y2 = 12
⇒ 36 + 3y2 - 12√3y + 9y2 = 108
⇒ - 12√3y + 12y2 - 72 = 0
⇒ -√3y + y2 - 6 = 0
⇒ (y - 2√3)(y + √3) = 0
⇒ y = 2√3 or - √3
If y = 2√3, x = (6 - 6) / 3 = 0
If y = -√3, x = (6 + 3) / 3 = 3
So, the third vertex of the equilateral triangle = (0, 2√3) or (3, -√3).
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