Question

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

Answer 1

Answer:

r=0.24m

h=7m

CSA=2πrh

CSA=2*22/7*7*0.24

CSA=10.56m2

cost of 15 pillars=15*2.5*10.56

=rs396