The total cost of flooring a room at Rs. 8.50 per square metre is Rs. 510. If the length of the room is 8 m, its breadth is :

A. 7.5 m

B. 8.5 m

C. 10.5 m

D. 12.5 m

Answer: Option A

Solution(By Examveda Team)

Area of the floor :
$$\eqalign{ & = \left( {\frac{{510}}{{8.50}}} \right){m^2} \cr & = 60\,{m^2} \cr} $$
∴ Breadth of the room :
$$\eqalign{ & = \left( {\frac{{60}}{8}} \right)m \cr & = 7.5\,m \cr} $$