Question

The cost of fencing a square park at $Rs1.20$ per m is $Rs3600$. Find the cost of grassing the park at the rate of $Rs60$ per $100m^2$

Answer 1

Cost of fencing per meter$=1.02$Rs.

Total cost$=3600$

No. of meters $=$ Perimeter of Park$=\frac{3600}{1.2}=\frac{36000}{12}=3000$

Let side of square park$=K$m

Perimeter$=4K$

$4K=3000K=\frac{1500}{2}=750$

Side of square park $=750$m

Area of square park$={750}^2=5650m^2$

Cost of grassing per $100m^2=60$Rs.

Cost of grassing per $m^2=\frac{60}{100}=0.6$Rs.

Cost of grassing whole park

$=56250\times 0.6$

$5625\times 6=3150$Rs