Question

there are 12 cylindrical pillars , each of diameter 56 cm and height 440 cm in a hall . Find the cost of painting the pillars at the rate of rs.50 per sq.m .

Answer 1

it is perfectly correct

Answer 2

The cost of painting the pillars at the rate of rs.50 per sq.m .is Rs.92.928

Step-by-step explanation:

Diameter of pillar = 56 cm =0.56 m

Radius of pillar = $\frac{56}{2}=28 cm = 0.28 m$

Height of pillar = 440 cm = 4.4 m

Curved surface area of pillar =$2 \pi r h = 2 \times \frac{22}{7} \times 0.28 \times 4.4 =7.744 sq.m.$

Curved surface area of 12 pillars = 7.744 \times 12 = 92.928 sq.m.

Hence the cost of painting the pillars at the rate of rs.50 per sq.m .is Rs.92.928

#Learn more:

A cylindrical pillar is 50 cm in diameter and 3.5 m in height find the cost of painting the curved surface of the pillar at the rate of rs 12 .50 per M2

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