(ii) What is the C.S.A. of a cylinder whose base area is 25π sq cm and height 10 cm?
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Radius of cylinder (r)=7cm
Height of cylinder (h)=15cm
Curved Surface Area =2πrh
=2×(22/7)×7×15
=660cm2
Total Surface Area =2πr(h+r)
=2×(22/7)×7(15+7)
=2×22×22
=968cm2
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