Question

The total cost of tiling a rectangular room at ₹8.50 per sq. metre is ₹510. If the length of the room is 8 m, then find the breadth.

• A. 5.7 cm
• B. 6.7 cm
• C. 7.5 m
• D. 7.6 m

Answer 1

The correct option is C 7.5 m

Given, Total cost = ₹510,
Cost of tiling per sq. metre = ₹8.5
Length of room is 8 m.

$\because$ Total cost = Area of the room $\times$ cost of tiling per sq metre
$\Rightarrow$ 510 = Area of the room x 8.5
$\Rightarrow$ Area of the room $=\frac{510}{8.5}=60m^2$
$\because \text{Area of rectangle}=l\times b$
$\Rightarrow 60=8\times b$
$\Rightarrow b=7.5m$