Question

find the cost of whitewashing 20 cylindrical pillars of height 15 M and radius 0.7m at r 5/msquare​

Answer 1

Step-by-step explanation:

Given length or height of pillar =3.5m

Radius of each pillar =36cm

CSA of pillar =2πrh=2π×0.36×3.5

CSA=7.91m

2

Now total area to be painted =7.91×20

Total Area =158.20m

2

Cost of painting =158.20×3=474.60.