Subject: General Aptitude · Chapter: Area · Exam: 2007 · Marks: · Difficulty:
A rectangular courtyard, 3.78 m long and 5.25 m broad, is to be paved exactly with square tiles, all of the same size. Find the least number of square tiles covered.
Answer
Answer (as printed):
Explanation
Area of the room $=(378 \times 525) \mathrm{cm}^{2}$. Size of largest square tile = H.C.F. of 378 cm and 525 cm = 21 cm. Area of 1 tile $=(21 \times 21) \mathrm{cm}^{2}$. ∴ Number of tiles required $=\left(\frac{378 \times 525}{21 \times 21}\right)=450$.
Explanation as extracted from the printed page; notation may be imperfect.