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 80 per square metre.
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Answer:
diameter =56cm
radius =dianeter/2
=56/2
=28cm
height =2.25m
=2.25×100cm
=225cm
Total Surface area of metallic sheet = 2×22/7×r(r+h)
=2×22/7×28(28+225)
=2×22×4(253)
=176×253
=44528cm^2
or,
tsa=44528/100m^2
=445.28m^2
cost=445.28×80
=35622.4rupees
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