Question

a horse is placed for grazing inside a rectangular field 70 m by 52 m. it is tethered to one corner by a rope 21 m long . on how much area can it graze?how much area is left ungrazed?

Answer 1

Area that can be grazed by horse = $\frac{\pi r^2}{4}=\frac{22}{7\times 4}\times 21\times 21=\frac{693}{2}=346.5$ $m^2$

Area left ungrazed = $70\times 52-346.5=3640-346.5=3293.5$ $m^2$