Question

A part $1m$ wide is built along the border and inside a square garden of side $30m$. Find
The cost of planting grass in the remaining portion of the garden at the rate of $Rs.40per{m}^2$.

Answer 1

Since the path is built inside a square garden

A new square is formed after the path is built

Width of path is $1m$

So the side of the new square will be $30-1-1=28m$

Area of the garden is ${28}^2=784m^2$

Cost of planting is $40\times 784=Rs.313,60$