the ratio of the total surface area to the lateral surface area of cylinder with base radius 80 cm and height 20 cm is
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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
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