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The are of a square field is 60025 square meter. a man cycles along its boundary at 18km per hour. in how much time will he return at the starting point?



Area of the field=60025                   m^{2}
We know the formula
Area= Side^{2} (for a square).
⇒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* \frac{5}{18} m/s=5 m/s.
⇒Time= \frac{Distance}{Speed}
 \frac{245*4}{5} sec
=49*4 seconds
 =196 seconds.
Ans:The required time is 196 seconds.
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