The height of a circular cylinder is 20 cm and the radius of its base is 7cm. Find the volume and t.s.a
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Answer:
Given-
height = 20cm
radius = 7cm
(i) Volume
v = πr^2h
= (22/7) * 7 * 7 * 20
= 22 * 7 * 20
= 3080cm^2
(ii) Total surface area
T.S.A. = 2πrh + 2πr^2
= 2 * (22/7) * 7 * 20 + 2 * (22/7) * 7 * 7
= 2 * 22 * 20 + 2 * 22 * 7
= 880 + 308
= 1188 cm^2
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