A coaching institute wants to execute tiling work for one of its teaching halls 60 m long and 40 m wide with a square tile of 0.4 m side. If each tile costs Rs. 5, the total cost of tiles would be :

A. Rs. 60000

B. Rs. 65000

C. Rs. 70000

D. Rs. 75000

Answer: Option D

Solution(By Examveda Team)

Number of tiles required :
$$\eqalign{ & = \frac{{{\text{Area of hall}}}}{{{\text{Area of each tile}}}} \cr & = \left( {\frac{{60 \times 40}}{{0.4 \times 0.4}}} \right) \cr & = 15000 \cr} $$
∴ Total cost of tiles :
= Rs. (15000 × 5)
= Rs. 75000