Question

EXAMPLE 6
and diameter of the base
Solution
Find the height of the cylinder whose volume is 3.08 m
is 280 cm
280
Here. V =3,08 m and
cm = 14 m.
2
y = 2h
v 3,08 mºx7
he
m=0.5 m
72 2 22*(1.4x 1.4 m² 2
So, the height of the cylinder is
1
m = 50 cm
2
EXAMPLE 7
3
Find the radius of the base of a cylinder whose volume is 12320 cm and height is
20 cm.
Solution
Here, y = 12320 cm3 and h = 20 cm.
Let the radius of the base ber.
Here. V = arah =12320 cm
12320 cm
2
12320 x 7 cm
= 196 cm
22 x 20 cm
r = 196 cm² = 14 cm.
So, the radius of the base is 14 cm.
EXAMPLE 8
The radius and the height of a cylinder are in the ratio 7:11, and the volume of
the cylinder is 13552 cm. Find Its radius of the base and its height.
Solution
Let the radius ber =7x cm and the height be h=11x cm.
Here, volume of the cylinder = 13552 cm
arn=13552 cm
22
x7x x 7xxllx = 13552
7
22 x7x11x3 = 13552
13552
= 8.
22 x7x11
x = 2
So, the radius of the base is 7x cm = 14 cm and the height of the cylinder is
11x cm = 22 cm.
EXAMPLES
How many cubic metres of earth must be dug to construct a 25-m-deep well of
diameter 5.6 m? If the earth taken out is spread over a rectangular plot of size
22 m x 16 m, find the height of the platform so formed.
5.6
Solution
Here, h = 25 m and r = m=28 m.
2
volume of the earth dug out = volume of the well = ar
1 = arah
22
x28x28x25 m² =616 m.
7
22 쪽​

Answer 1

Step-by-step explanation:

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Answer 2

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Mujko correct answer chahiye!!!