Ram paid 2200 Rs to paint the inner surface of a cylindrical vessel 10 m deep. If the
cost of painting is at the rate of 20 Rs per m2
Find
Area of base
Total surface area
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Total cost of point=2200Rs.
cost of point/m2=20Rs.
depth of cylindrical vessel=10m
Inner curved surface area painted=cost/m2totalcost=202200=110m2
Now, 2πrh=110m22×722×r×10=110r=2×22×10110×7=1.75m
∴ radius of the base is 1.75m
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