(b) An oil drum is in the shape of cylinder, whose diameter is 2 m. and height
is 7 m. The painter charges 5 per m² to paint the drum. Find the total
charges to be paid to the painter for 10 drums.
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Answer:
Ra.2200
Step-by-step explanation:
Given ,diameter of drum=2m
heigth of the drum=7m
so radius =d/2
=2/2
=1m. _
Total surface area of the drum=2 / |rsq.h
=2×(22/7)×1×1×7
=44m sq.
total surface area of10 such drums
=44×10
=440msq
cost of painting 10 drums=totalsurface area of all drums×cost mpersq.
=440×5
=Rs.2200
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