Question

Find the time taken by a person in walking along the boundary of a square field of area 40000 m² at a speed of 4 km/h.

Answer 1

Answer:

area=a²

40km²=a²

20km=a

perimeter=4a=4(20)=80km.

$s = \frac{d}{t}$

4km/h=80km/t

t=80km/4km/h=20hs.

Answer 2

Answer:

answer attached in photo