Question

A mansion has 12 right cylindrical pillars each having radius 50 cm and height 3.5 cm.
Find the cost to paint the lateral surface of the pillars at Rs.20 per square metre.

Answer 1

Answer:

Step-by-step explanation:

We have,

12 right cylinder pillars each having radius 50 cm and height 3.5 m.

r=0.5 m

h=3.5 m

Cost of paint =Rs. 20 per m2

We know that the lateral surface area of the cylinder

=2πrh

According to the question,

Total cost =12×20×2×722​×0.5×3.5

=12×20×2×22×0.5×0.5

=Rs. 2640