Find the cost of painting the outside surface of a solid cylinder of diameter 7m and height 25m at rs 8 per square meter
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Answer:
Step-by-step exp nolanation:
The formula of outer surface area of cylinder is 2πrh.
To know the outer surface area we need to evaluate it .
Given that d=7therefore r=7/2,
h=25.
2πrh
=2×22/7×7/2×25
=22×25=
=550cm^2
Since cost of painting is 8per cm^2
=550×8
=4400Rs
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