Question

$50$ square stone slabs of equal size were needed to cover a floor area of $72$ sq m. The length of each stone slab is

• A. $102$ cm
• B. $120$ cm
• C. $201$ cm
• D. $210$ cm

Answer 1

The correct option is B $120$ cm

Let length of each stone be ${}^{\prime }{a}^{\prime }$.

Now, area of 50 square stones = area of floor

$\Rightarrow 50\times a^2=72\Rightarrow a^2=\frac{72}{50}=1.44\Rightarrow a=\sqrt{1.44}=1.2m$

$\therefore$ length $=$ $1.2m$ $=$ $120$ cm