Question

The ratio of the TSA and CSA of a cylinder whose radius is 10cm and height is 15cm is ________.

Answer 1

Answer:

Volume of remaining solid = volume of cylinder - volume of cone.r = 5 cm (given)h = 12 cmVolume of cylinder = π r2h = 3.14 × 52 × 12 = 942 cm2

.

Answer 2

TSA OF CYLINDER = 2πr(r+h)

CSA OF CYLINDER = 2πrh

r=10cm

h=15cm

RATIO = 2πr(r+h) : 2πrh

              r+h : h

               10+15 : 15

             25 : 15

           =   5 : 3