Question

In a temple there are 25 cylindrical pillars. the radius of each pillar is 28cm and height 4m. the total cost of painting the curved surface area of pillars at the rate of rs. 8 per m2

Answer 1

We get the width of the pillar by getting the circumference of the top of one pillar.

Convert the radius into metres=28/100=0.28m

Circumfrence =22/7×2×0.28=1.76m

The curved surface area=1.76×4=7.04m2

For the 25 cylinders=25×7.04=176m2

The cost of painting =176 × 8=Rs 1408

Answer 2

Answer:

We get the width of the pillar by getting the circumference of the top of one pillar.

Convert the radius into metres=28/100=0.28m

Circumference =22/7×2×0.28=1.76m

The curved surface area=1.76×4

=7.04sq.m

25 cylinder =25×7.04sq.m

=176sq.m

The cost of painting=176×8

=₹1408

Hope this answer help you!