"Four horses are tethered at four corners of a square plot of side 63 metres so that they
Channel: Doubtnut
Date: 2020-04-05

"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
(a) 675.5 m2 (b) 780.6 m2 (c) 785.8 m2 (d) 850.5 m2"