Question

Four cylindrical pillars of a building are to be painted. If the diameter of each pillar is 1.4m and it's height is 6m, find the cost of painting the curved surfaces of all the pillars at the rate of Rs 10 per.sq.m.

Answer 1

Answer: 105/6m^2

Step-by-step explanation:

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Answer 2

The cost of painting the curved surfaces of all the pillars at the rate of Rs 10 per.sq.m. is Rs.1056

Step-by-step explanation:

Diameter of cylindrical pillar = 1.4 m

Radius of cylindrical pillar = $\frac{1.4}{2}=0.7 m$

Height of cylindrical pillar = 6 m

Curved surface area of pillar =$2\pi r h = 2 \times \frac{22}{7} \times 0.7 \times 6 = 26.4$

Curved surface area of 4 pillars = $26.4 \times 4 = 105.6 m$

Cost of painting 1 sq.m. = Rs.10

Cost of painting 105.6 sq.m. =$105.6 \times 10 = 1056$

Hence the cost of painting the curved surfaces of all the pillars at the rate of Rs 10 per.sq.m. is Rs.1056

#learn more:

A cylindrical pillar is 50cm in diameter and 3.5m in height .find the cost of painting the curved surface of the pillar at the rate of the of Rs 12.50perm2

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