Question:
A room is 16 m long and 13.5 m broad. Find the cost of covering its floor with 75-m-wide carpet at ₹60 per metre.
Solution:
As, the area of the floor $=$ length $\times$ breadth
$=16 \times 13.5$
$=216 \mathrm{~m}^{2}$
And, the width of the carpet $=75 \mathrm{~m}$
So, the length of the carpet required $=\frac{\text { Area of the floor }}{\text { Width of the carpet }}$
$=\frac{216}{75}$
$=2.88 \mathrm{~m}$
Now, the cost of the carpet required $=2.88 \times 60=₹ 172.80$
Hence, the cost of covering the floor with carpet is ₹172.80.
Disclaimer: The answer given in the textbook is incorrect. The same has been rectified above.
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