Q9 of 114 Page 3

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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