Question

help please friends .... solution

Answer 1

speed=400×15/8×60=100/8m/s=12.5m/s

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Answer 2

We know that 1 minute = 60 seconds.

Then, 8 minutes = 8 * 60 = 480 seconds.

Given Distance = 400 m.

Now,

We know that Speed = Distance/Time

                                   = (400/480) m/s

                                   = 0.8333 * 3.6 km/hr  [1 m/s = 3.6km/hr]

                                  = 3 km/hr.

Hope it helps!