Question

Two cylinders have bases of same size . The diameter of each is 7 cm .if one of the cylinder is 10 cm high and the other is 20cm high then the find the ratio of their volumes​

Answer 1

Step-by-step explanation:

Given: Diameter of base of cylinder =14 cm.

∴ Radius (r)=

2

14

=7 cm.

and Height of cylinder is h=20 cm.

So, Surface area of cylinder =2πr(r+h)

=2×

7

22

×7(7+20)

=44×27

Surface area of cylinder =1188 sq.cm.

Volume of cylinder =πr

2

h

=

7

22

×7

2

×20

=22×7×20

Volume of cylinder=3080 cu.cm

Hope u find helpful.