Question

Find the cost of painting 15 cylindrical pillars of a building at rs. 2.50 per square meter if the diameter and height of each pillar are 48 Cm and 7 meter respectively.

Answer 1

Answer:

Step-by-step explanation:

d=48 cm

r= 24 cm= 0.24 m

h= 7 m

Curved surface area of cylindrical pillar= 2 * pie * r * h = 2* 22/7* 0.24 * 7

                                                                = 10.56 m^2

cost= 15*10.25*2.5= 384.375 rupees