it is required to make a closed cylindrical tank of height 1 m and base diameter 120 cm from a metal sheet how many square metres of a sheet are required for the same
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we have h=1m and r=0.6m i.e 6/10
total surface area of cylinder=2πr(h+r)
2x 22/7x6/10(1+0.6)
=2*17*3*166/175
=6.03cm square
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