A horse is tied with a rope of

length 7meter at one corner of a square field
having a side of 10 meter . the area of the field
out of reach for the horse is ?

1 answer

Did you make a sketch?
Shade in the area not reached by the horse

The area reached by the horse is 1/4 of a circle with radius of 7 m
that area = (1/4)π(49) = 12.25π m^2
Area of the whole square = 100 m^2

So .....