Q5 of 70 Page 19

The capacity of a closed cylindrical vessel of height 1 m is 15.4 litres. How many square metres of metal sheet would be needed to make it?


Given,


Volume of cylindrical vessel = 15.4 litre = 15400 cm3


Height of vessel = 1 m = 100 cm


= πr2h = 15400


= r2 =


= r =


Area of metal sheet required = 2πr(h+r)


=


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