Subject: General Aptitude · Chapter: Area · Exam: 2011 · Marks: · Difficulty:
What is the minimum number of identical square tiles required to tile a floor of length 6 m 24 cm and width 4 m 80 cm?
(a)122
(b)130
(c)148
(d)165
(e)None of these
Answer
Answer (as printed): B
Explanation
Length of largest lile = H.C.F. of 624 cm and 480 cm = 48 cm. Area of each tile $=(48 \times 48) \mathrm{cm}^{2}$. $$\text { ∴ } \text { Required number of tiles }=\left(\frac{624 \times 480}{48 \times 48}\right)=130 .$$
Explanation as extracted from the printed page; notation may be imperfect.