Question

Find the cost of painting 15 cylindrical pillars of a building at ₹2.50 per square metre if the diameter and height of each pillar are 48 m and 7 metres respectively.

Answer 1

Answer:

the answer is 39600/-

Step-by-step explanation:

given

diameter =48m

height =7m

radius. =48/2

=24

curved surface area of a cylinder =2πrh

=2*π*24*7

=44*24

=1056.

the cost of painting cylinders @ 2.5/-=1056*2.5

=2640/-

for 15 cylinders=2640*15

=39600/-

therefore the cost of painting is Rs 39600/-