Question

Find the ratio of total surface area to the lateral suraface area of a cylinder with base radius 80cm and height 20cm.

Answer 1

tsa of cylinder= 2pir(r+h)
lsa of cylinder= 2pirh

tsa/lsa=2pir(r+h)/2pirh                   ( 2pi and r cancel)

= r+h/h
=80+20/20
=100/20
=1/5
= 1:5

Answer 2

OK I an typing the answer

Step-by-step explanation:

2 pir(r+h)

2pirt

total surface area/lateral surface area

2pir(r+h)/2pirh

r+h/n

80+20/20=100/20

1/5

1:5