Question

a girl walks distance 4 km in 2 hours calculate speed in m/s​

Answer 1

Answer:

d = 4 km

t = 2 h

$speed = \frac{d}{t } \\ = \frac{4km}{2h}$

= 2km/h

Answer 2

Given :

• A girl walks a distance of 4 km in 2 hours.

To find :

• the speed in m/s.

Solution :

⇒ Let's convert km to m and hour to second.

1 kilometers = 1000 meters

4 kilometers = 1000 × 4

= 4000 meters

1 hour = 3600 seconds

2 hours = 3600 × 2

= 7200 seconds

⇒ Let's find the speed in m/s.

Speed = Distance/Time

= 4000/7200

= 0.55

= 0.55 m/s

• Therefore, speed of the girl is 0.55 m/s.