The number of marble slabs of size 20 cm × 30 cm required to pave the floor of a square room of side 3 metres… · ABC26GN4382

Subject: General Aptitude · Chapter: Area

The number of marble slabs of size 20 cm × 30 cm required to pave the floor of a square room of side 3 metres is

(a)100

(b)150

(c)225

(d)250

Answer

Answer (as printed): D

Explanation

Number of marbles $=\left(\frac{300 \times 300}{20 \times 30}\right)=150$.

Explanation as extracted from the printed page; notation may be imperfect.

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