Question
A horse is placed for grazing inside a reangular field $70\ m$ by $2\ m.$ It is tethered to one comer by a rope $21\ m$ long. On how much area an it graze$?$ How much area is left ungrazed? $\Big[\text{Use }\pi=\frac{22}{7}\Big]$
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Answer
Area ehich the horse can graze $=$ Area of the quadrant of radius $21\ m$
$=\Big(\frac{1}{4}\times\frac{22}{7}\times21\times21\Big)\text{m}^2$
$=346.5\text{m}^2$
Area ungrazed $=[(70\times52)-346.5]\text{m}^2$
$=3293.5\text{m}^2$
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