Question
The slant height and base diameter of a conical tomb are 25 m and 14 m respectively. Find the cost of white-washing its curved surface at the rate of र 210 per 100 m2.
Solution
Slant height (l) = 25 m Base diameter (d) = 14 m
Base radius (r) = 
∴ Curved surface area of the tomb =
rl
Cost of white-washing the curved surface of the tomb at the rate of र 210 per 100 m2
Base radius (r) = ∴ Curved surface area of the tomb =
rlCost of white-washing the curved surface of the tomb at the rate of र 210 per 100 m2
