Question

Twenty cylindrical pillars of a bungalow are to be
cleaned. If the diameter of each pillar is 0.50 m and
height 4 m, what will be the cost of cleaning them at
the rate of 2.50 per square metre?
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Answer 1

Step-by-step explanation:

1. total surface area of cylinder =2πr(r+h)
2. =2x3.14x0.50(0.50+4)
3. =14.13m^2
4. rate=14.13x2.50=35.325 rps