The area of a square field is 60025m2. A man cycles along its boundary at 18 Km/hr. In how much time will he return at the starting point?
Area of square field = 60025 m2
Speed of cyclist = 18 km/h
= 18 × 
= 5 m/s2
Area = 60025 m2
Side2 = 60025
Side = 
= 245
Therefore,
Total length of boundary = 4 × Side
= 4 × 245
= 980 m
Hence,
Time taken = 
= 196 seconds
= 3 minutes and 16 seconds
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