How long does it take for the crossing to cover 7.2 km if it goes uniformly at a speed of 1 m / s?

To determine the time spent by the pedestrian in question, we will use the formula: t = S / V.

The values of the variables: S is the distance that a pedestrian must travel (S = 7.2 km = 7.2 * 10 ^ 3 m); V – constant speed (V = 1 m / s).

Let’s perform the calculation: t = S / V = 7.2 * 10 ^ 3/1 = 7.2 * 10 ^ 3 s or 2 hours.

Answer: c) a pedestrian will need 2 hours of time.