Question

10 Cylinderical pillars of building have to be painted if the diameter of each pillar is 50 cm and the height 4 m what will be the cost of painting these at the rate of 50paise per m

​

Answer 1

Question

10 Cylinderical pillars of building have to be painted if the diameter of each pillar is 50 cm and the height 4 m what will be the cost of painting these at the rate of 50paise per m

Answer

Given:-

d=50 m

h=4 m

Surface area of 10 cylindrical pillars =2πrh×10

=2×3.14(0.25)² ×4×10=15.7m²

[r= 50cm/2 =25cm=0.25m]

Cost of painting =Rs.(15.7×0.50)=Rs.7.85