Question

A square-field has area 3.32,929$m^2$. It has to be fenced using barbed wire, The barbed wire should go round the field 5 times. The barbed wire is available in bundles of 100 m length. The vendor sells the wire only in complete bundles. How many bundles have to be bought?

Answer 1

First we find the perimeter of the square-field by finding its side length.
We use division method.
We obtain $\sqrt{332929}=577$ Hence the perimeter of the field is $577\times 4=2,308m$.
The length of the required barbed wire is $5\times 2308=11,540m$ can you notice that
$115\times 100=11500<11540$, and
$116\times 100=11600>11540$.
Hence the number of bundles to be bought is 116.