question_answer

Four horses are tethered at four corners of a square plot of side 28 m so that the adjacent horses can just reach one another. What is the area of field which remains ungrazed? \[\left( \text{Use}\,\,\pi \,\,\frac{22}{7} \right)\]

A)  \[168\,\,{{m}^{2}}\]   

B)  \[172\,\,{{m}^{2}}\]

C)  \[142\,\,{{m}^{2}}\]               

D)  \[184\,\,{{m}^{2}}\]

E)  None of these