Question

The total cost of flooring a room at $Rs.8.50$ per sq. metre is $Rs.510$. If the length of the room is $8$ metres, find its breadth.

• A. $7.4m$
• B. $7.5m$
• C. $8.5m$
• D. $5.8m$

Answer 1

Answer: (B)

Given:

Cost of flooring per square meter = $Rs.8.50$ per $m^2$

$\Rightarrow$ Total cost of flooring of room = $Rs.510$

$\therefore$ Area of the room = $\frac{Rs.510}{Rs.8.50/m^2}=60m^2$

$\Rightarrow$ Area of the floor = $l\times b$

It is given that, length of the room is $\left(l\right)=8m$

$\Rightarrow$ $8\times b=60m^2$

$\Rightarrow$ $b=\frac{60m^2}{8m}=7.5m$.

$\therefore$ Breadth of the rioom is $7.5m.$

Hence, Option B is correct.