Question

Diameter of a cylindrical pillar is 50 cm and its height is 3.5 cm. Find the expenditure of white washing the curved surface of the pillar at the rate of Rs 12.50 per sq m

Answer 1

hiii!!!

here's ur answer...

given the diameter of the cylindrical pillar is 50cm

therefore radius of the cylindrical pillar = 50/2

= 25cm

height is given 3.5cm.

CSA of the pillar = 2πrh

= 2×22/7×25×3.5

= 3850/7

= 550cm²

cost of white washing the CSA of the pillar at the rate of ₹12.5 per m² = 550×12.5

= ₹6875

hope this helps..!