Question

A circular garden of radius 15 m is surrounded by a circular path of width 7 m. If the path is to be covered with tiles at a rate of Rs. 10 per `m^(2)`, then find the total cost of the work. (in Rs.)
A. 8410
B. 7140
C. 8140
D. 7410

Answer 1

Correct Answer - C
(i) Area of circular path = Area of ring.
(ii) Area fo path = `pi(R^(2)-r^(2))`.
(iii) Total cost = Area `xx` cost/`m^(2)`.