Question

In a building there are 20 cylindrical pillars. The radius of each pillar is
28cm and the height is 4 m. Find the total cost of painting the curved
surface area of pillars at the rate of Rs.10 per m2.

Answer 1

Answer:

c s a of cylinder =2πrh

=2*22/7*0.28/4

=2*22*0.01

=44*0.01

=0.44m²

cost of painting per m² is 10 rupees

for 0.44m²=0.44*10=4.4 rupees

for to paint 20 pillars =20*4.4

=88 rupees