Find the cost of paintings of the outside surface of a solid cylinder of diameter 7m and height 25m at 8 rupees per square metre.
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Step-by-step explanation:
radius=d/2
radius=7/2 height=25m cost of painting =Rs/8
Total surface area = 2*pi*r(r+h)
=2*22/7*7/2(7/2+25)
=44/7*7/2( LCM=7/2+50/2)
=44/7*7/2*57/2 (simplification)
=11/1*1/1*57/1
=627sq.m
cost for painting=627*8
=5016Rs.
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