The capacity of a closed cylindrical uessel of height 1 m i.s15.4 litres. How many square metres of metal sheet would be needed to make it?

Capacity of closed cylindrical vessel = 16.4 l = 16.4 x 1000 cm.3 = 16400 ems. Height = 1 m = 100 cm. 'lri1'h = 15400 722 x .,:;. x 100 = 16400 ,_ 154 x 7 r = = 49 r 7 cm. 22 Area of met.al sheet needed = 2ttr(h + r) = 2 x 7 x 7 x(lOO + 7) cm2 = 4708 cm2 = 0.4708 m2•