Question

13. The area of a square field is 60025 m square. A man cycles along its boundary at 18 km/hr. In how
much time will he return at the starting point?​

Answer 1

Area of the field=

We know the formula

(for a square).

⇒60025=side²

⇒side=√60025

⇒side=+245 m or - 245 m.

Neglecting -ve value side=245 m.

⇒Perimeter=4*Side(For a square)

⇒P=245*4 m (Which is also the total distance)

⇒Speed= 18 km/h

⇒18 km/h=18* m/s=5 m/s.

⇒Time=

⇒

=49*4 seconds

 =196 seconds.

Ans:The required time is 196 seconds.