Question

the length of a rope by which a horse must be tethered so that it may be allowed to graze over an area of 154 sqaure metres is​

Answer 1

area in which the horse can graze = πr^2

154m^2 = 22/7 * r^2

(154m^2 * 7) / 22 = r^2

49m^2 = r^2

r = √49m^2 = 7m

so the length of the rope = 7m