Question

21. The diameter of circular base of a cylinder is 7 metres. If volume is 770 cu. m, then ſind its height and total surface area? ​

Answer 1

Answer:

Volume of cylinder =πr

2

h (r= radius, h= height)

Radius =

2

diameter

=

2

7

⇒770=

7

22

×

2

7

×

2

7

×h

⇒h=20m.

Answer 2

Answer:

H=20m .

This is short answers