A cup in the form of a hemisphere surmounted by a cylinder the height of the cylindrical portion is 8 cm and the total height of the cup is 11.5 cm. Find the total surface area of the cup
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Radius will be 3.5 cm. Therefore T.S.A. will be 313.5 cm square
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Answer:
total hieght of cylindrical portion is 8cm
total height of cup is 11.5.
r=11.5-8=3.5cm
cylindrical portion h=8cm
r=3.5=7/2
TSA of cup =CSA of hemisphere +CSA of cylindrical portion
2πr2+2πrh=2πr(r+h)
=2×22/7×7/2(7/2+8)
TSA of cup =253 sqcm
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