Question

Find the length(in m) of the wire to go $25$ times around a square field which is one hectare in area.

Answer 1

Area$=1$ hectare$=10,000m^2$
$\therefore$ Side of the square $=100m$
Length of the wire required to go once round a field
$=4\times 100m=400m$
$\therefore$ required length $=25\times 400m=10,000m$