A horse is tied to a peg hammered at one of the corner of a rectangular grass field of 40 m by 24 m by a rope 14 m long. Over how much area of the field can the horse graze?

Answer 1

Draw a picture:!

The area of the rectangle is 40m*24m = 960 m²

The "post at the corner" allows a radius of 14m which is 1/4th of a circle:

That area is (1/4)Π(14)² = 153.86 m²

In term of percent, (153.83 / 960 = 16% of the field.