Question

The ratio of TSA to CSA of
Cylinder with the base radius 80 cm
and
height
IS 20cm.​

Answer 1

Answer:

The ratio of TSA to CSA of the given cylinder = 21 : 1

Step-by-step explanation:

Given radius(r) = 80 cm , height(h) = 20 cm

TSA of a cylinder = 2πrh + 2πr

CSA of a cylinder = 2πrh

TSA = 2π(80 * 20) + 2π(80)

TSA =  2π(1600 + 80)

TSA =  2π(1680)

CSA = 2π(80)

TSA : CSA = 2π(1680) : 2π(80)

 TSA : CSA = 1680 : 80

TSA : CSA = 21 : 1

Answer 2

TSA of cylinder = 2 pir ( r+h)

ISA of cylinder = 2 pir

TSA/ISA = 2 pir( r+h)/2 pirh

( 2pi and r cancel)

r+ h/h

80+20/20

100/20

1/5

1:5

Step-by-step explanation:

I HOPE IT IS HELPFUL FOR YOU