Question

Find the cost of leveling a playground at $₹$$3persquaremetre$ if it is $30m$ long and $15m$ wide . Also, find the cost of fencing it at $₹$ $1.20permetre.$

Answer 1

Step 1: Area of playground

Length of playground $=30m$

Breadth of playground $=15m$

Area of playground $=30\times 15=450m^2$

Step 2: Cost of levelling

Cost of levelling $1m^2$ $=₹3$

Cost of levelling $450m^2=₹3\times 450=₹1,350$

Step 3: Perimeter of playground

Length of playground$\left(l\right)=30m$

Breadth of playground$\left(b\right)=15m$

Perimeter of playground$=2(l+b)$

$$\begin{gathered} =2(30+15) \\ =2\times 45=90m \end{gathered}$$

Step 4: Cost of fencing playground

Cost of fencing $1m=₹1.20$

Cost of fencing $90m=₹1.20\times 90$

$=₹108$

Thus, the cost of levelling is $₹1,350$ and the cost of fencing is $₹108$.