Question

20 cylindrical pillars of the parliament House are to be cleaned .if the diameter of each pillar is 0.5 m and height is 4m what will be the cost of cleaning them at the rate of Rs 2.50paise per square metre

Answer 1

hope you got the answer

Answer 2

Answer:

Step-by-step explanation

Diameter=0.50m

Radius=0.50/2= 0.25m

Height= 4m

Curved surface area of 1 pillar =2×22/7×0.25=44/7

Csa of 20 pillars =20×44/7=125.71