A closed metallic cylinder has its base diameter 56 cm and it is 2.25 m high. Find the cost of the metal used to make it if it costs rs 80 per square metre.
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Step-by-step explanation:
area of closed cylinder = 2πr(h+r)
=diameter is 56 cm So,56*1/2 =28 cm
=2*22/7*28(2.25+28) =1331 cm
metallic cylinder =1331 *80= rs 106480
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