Question

The area of a square field is 60025 m2
. A man cycles along its boundary at a speed of 98
metres per minute. In how much time does he returns to the starting point?

Answer 1

Step-by-step explanation:

Area=60025 m square =side^2

Therefore, side of field= 245m

Now, the perimeter or the length of boundary of field= 4*side= 980m

Now, we know that speed=distance/time

But given speed is in km/hr

So, speed in m/s= 18*(1000/3600) =18*(5/18) = 5m/s

Now, speed = distance/ time

So, 5= 980/t

So, time taken= 980/5= 196 seconds

or 3 minutes 16 seconds.