5. A cylindrical pillar is 1 m in diameter and 4.2 m in height. Find t

1.	5. A cylindrical pillar is 1 m in diameter and 4.2 m in height. Find the cost of white washing the curvedsurface of the pillar at the rate of 15 per m26. Find the height of the solid circular cylinder of totol auafi
Answer» Curved surface area of cylinder= 2pirh r = 1/2 m, h = 4.2 m = 2(22/7)(1/2)4.2= 22(.6)= 13.2 m^2 Cost of painting = 15*13.2 = Rs 198

5. A cylindrical pillar is 1 m in diameter and 4.2 m in height. Find the cost of white washing the curvedsurface of the pillar at the rate of 15 per m26. Find the height of the solid circular cylinder of totol auafi

Answer»

Curved surface area of cylinder= 2*pi*r*h

r = 1/2 m, h = 4.2 m

= 2*(22/7)*(1/2)**4.2= 22*(.6)= 13.2 m^2

Cost of painting = 15*13.2 = Rs 198