Question

9. The radius and height of a cylinder
are in the ratio 5:7 and its volume is
550 cubic cm. Its radius will be...... *
(1 Point)
5cm
4 cm
6 cm
9 cm
This question is required.
SEEDHI BAAT​

Answer 1

Answer:

ANSWER

Let the radius of the base and height of the cylinder be 5x cm and 7x cm respectively. Then,

Volume = 550 cm

3

7

22

×(5x)

2

×7x=550

22×25x

3

=550

x=1 cm

Hence, radius of the cylinder = 5x = 5 cm.

Answer 2

Answer:

let the ratio be x

then r= 5x

h= 7x

volume = 550 cubic cm

since

volume =πr²h

therefore

550cubic cm = 22/7 * 5x * 5x * 7x

550 cubic cm = 22 * 25x³

x³ = 550 / 22*25

x³ =1

x = 1

r= 5x = 5*1 = 5 cm

h = 7x= 7*1= 7 cm