Question

the total surface area of a cylinder is 660cm sq and it base diameter is 14 CM finding it's height ​

Answer 1

TSA of cylinder=660cm^2=2πr(h+r)

diameter=14cm

so

radius=7cm

2*22*7(h+7)/7 = 660

44h+308 = 660

44h = 660-308

44h = 352

h = 352/44

h = 8cm

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Answer 2

TSA of the cylinder is 669cm=2*22/7/r(r+h)

diameter =14

so radius =1/2of diameter =7

660=2*22/7*7*(7+h)

660=44(7+h)

660/44=(7+h)

15=7+h

h=15-7

h=8

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