(111) capacity UI te vessel.
6. The capacity of a closed cylindrical vessel of height 1 mis 15.4 litres. How many
square metres of metal sheet would be needed to make it?
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Answer:
volume = πr^2L = 15.4×1000 cc=(22/7)r^2×100(cm)
r^2= 7×7
r=7cm
Total surface area = 2πrL + 2πr^2
=2πr(L+ r)
=2×(22/7)(100+7)×7
=2×22×107
=4708 Ans
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