Question

Diameter of a Cylinder is 2r cm and its height is h cm then its curved surface area

will be ………………… cm².

a) 4πr 2

b) 2 πrh c) 4 πrh d) πr 2
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Answer 1

Step-by-step explanation:

It is given that

Curved surface area =1210 cm

2

Diameter of the cylinder =20cm

Radius of the cylinder =

2

20

=10cm

We know that

Curved surface area of the cylinder =2 πrh

By substituting the values

1210=2×

7

22

×10×h

So we get

h=

2×22×10

1210×7

=19.25cm

We know that

Volume of cylinder =πr

2

h

By substituting the values

Volume of cylinder =

7

22

×(10)

2

×19.25

So we get

Volume of cylinder =6050 cm

3

Therefore, the height of cylinder is 19.25cm and the volume is 6050 cm

3

.

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