Question

the area of a square lawn is 105625 m². A boy is running along its boundary at a speed of 18 km per hour in how much time will he complete two rounds of the lawn.


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Answer 1

Answer:

Area = 105625 m^2

Side = √105625 m = 325m. Perimeter = 4 x 325 = 1300m.

Speed = 18km/h

Or in m/s = 5/18* 18 = 5m/s.

Time Distance/Speed

= 1300/5

=260sec.

Time for 2 rounds= 2*260 = 520sec Or 8min 40sec.