Question

The area of a playground is $3650$ $m^2$. Find the cost of covering it with gravel $1.2$ $cm$ deep, if the gravel costs $Rs.6.40$ per cubic metre.

• A. $Rs.280.32$
• B. $Rs.290.32$
• C. $Rs.380.32$
• D. $Rs.390.32$

Answer 1

The correct option is A $Rs.280.32$

Volume of the gravel will be $=$ Area of playground $\times$ depth $=3650$ $m^2\times 0.012m=43.8m^3.$
Cost of the covering with gravel $=Rs6.4$ $\times 43.8=Rs\mathrm{280.32.}$