The area of a square field is 60025sq.m. A man cycles along it's boundary at 18km per hour. In how much time he return at starting point

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Solution

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=4Side(For a square)
⇒P=2454 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.

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