The slant height and base radius of a conical tomb are 25 m and 24 m, respectively. Find the cost of whitewashing its curved surface at Rs. 12 per m2.
Given:-
Slant height of conical tomb, l=25 m
Radius of conical tomb, r=24 m
So,
Curved surface area of the conical tomb =πrl
=227×14×25
=44×25
=1100 m2
The cost of whitewashing per meter square is equal to Rs. 12.
Hence, the cost of the whitewashing of 1100 m2 is equal to 1100×12=Rs. 13200