the ratio of the total surface area to the lateral surface area of a cylinder whose radius is 20cm and height 60cm is
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Step-by-step explanation:
r=20cm,h=60
L.S.A of cylinder =2πrh
=2×πr(60)
=120πrcm²
T.S.A of cylinder=2πr(h+r)
=2πr(20+60)
=160πrcm²
ratio of the total surface area to the lateralsurface area of a cylinder
120πr:160πr
=3:4
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