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find the surface area of a hollow cylinder of internal radius 3 cm , width 0.5cm and height 7 cm.
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2pi *rh
2*22/7*2.5*7
=44*2.5
=110cm square
hope it helped
2*22/7*2.5*7
=44*2.5
=110cm square
hope it helped
kingly:
btt its answer is 306.41cm²
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