The least number of square tiles required to pave the ceiling of a room 525 centimetre long and 378 centimetre broad is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 407.
The maximum dimension of the square tiles required is HCF of 1295 and 385 = 35 cm
Area of the rectangle = Length × breadth
Area of the ceiling = (1295 × 385)
Least number of square tiles required = Area of ceiling/Area of square tiles
⇒ (1295 × 385)/(35 × 35)
⇒ 407