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Question

The area of a square field is 60025 m2. A man cycles along its boundary at 18 km/hr. In how much time will he return to the starting point?

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Solution

Area of a square field = 60025 m2
Let its side = a
a2=60025a=60025a=245m

Perimeter= 4a= 4×245=980m
Speed of cycling= 18 km/h
Time taken to complete its boundary
= 9801000×6018=4915 minutes
=3415minutes.
= 3 minutes 16 seconds

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