What is the least number of square tiles required to pave the floor of a room 15 m 17 cm long and 9 m 2 cm broad ?

A. 840

B. 841

C. 820

D. 814

Answer: Option D

Solution(By Examveda Team)

Required number of tiles are $$ = \frac{{{\text{Area of floor}}}}{{{\text{Area of tiles}}}}$$
Sides of tiles is HCF (1517, 902) = 41
∴ Area of tiles = 41 × 41
∴ Number of tiles $$ = \frac{{1517 \times 902}}{{41 \times 41}} = 814$$