Question

To fix fence wires in a garden, 70 m long and 50 m wide, Arvind bought metal pipes for bosts, he fixed a post every 5 metres apart. Each post was 2 m long. What is total length of the pipes he bought for the posts?

Answer 1

Length of the garden = 70 m
Breadth of the garden = 50 m
Perimeter of the garden = 2 $\times$(Length + Breadth)
= 2 $\times$ (70 + 50)
= 2 $\times$ 120 = 240 m
On the perimeter of the garden​, it is given that Arvind fixes a post every 5 metres apart.

So, the number of posts required = $\frac{240}{5}$ = 48
$\because$ Length of each post = 2 m
$\therefore$ Total length of the pipe required = 48 $\times$2 = 96 m