Question

How much time does it take a person to walk 12 km north at a velocity of 6.5 km/h?

Answer 1

distance s=12km=12x1000=12000m
velocity v=6.5km/h=6.5x1000/60x60=1.8m/s
time t=?
speed=distance travelled /time
time, t=distance, s/speed,v
t=s/v
t=6666.66sec.
t=1.85hour (approx)

Answer 2

As per the question, the person is heading towards north.

The displacement of the person [S] = 12 km towards north

The velocity of the person [V] = 6.5 km/hr

We are asked to calculate the time.

The time taken by the person to travel that distance-

                                               $t=\frac{S}{V}$

                                                    $=\frac{12\ km}{6.5\ km/hr}$

                                                    $=1.846\ hour$    [ans]