Four horses are tethered at four corners of a square plot of side 63 metres so that they just cannot reach one another. The area left ungrazed is: Choices:
A) 675.5m2
B) 780.6m2
C) 785.8m2
D) 850.5m2
E) 950.5m2
Required area= (63*63 – 4*1/4 *22/7 * 63/2 * 63/2)= 850.5m2 ANSWER:850.5m2
<result>D</result>
Four horses are tethered at four corners of a square plot of side 63 metres so that they just cannot reach one another. The area left ungrazed is: