Question

Solve the following:-
1. A person travels a distance of 72 km in 4 hours. Calculate average speed in km/hr and in m/s.​

Answer 1

Average Speed = Total Distance/Total Time

$v_{avg} = \dfrac{72 \: km}{4 \: hrs} = 18 \: km \: {h}^{ - 1}$

To Conver km/h into m/s, we multiply by $\frac{5}{18}$

$18 \times \dfrac{5}{18} = 5 \: m \: {s}^{ - 1}$

Answer 2

Average speed = Total distance travelled / Total. time taken.

= 72/4

= 18km/hr

= 18*5/18

= 5 m/s (as 18 and 18 gets cancelled)

#understand the concept

Hope it helps you..!

Explanation:

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