Question

A car travels a certain distance with the speed of 40 km/h and return with the speed of 46 km/h. Calculate the average speed of the entire journey. Section​

Answer 1

Step-by-step explanation:

2×v×v`/v+v`

2×40×46/86

40×46/43

1840/43

43 km/ h

approx.

Answer 2

Answer:

42.7906977 m/s

Step-by-step explanation:

To complete 1km distance with speed = 40km hr it takes time $t_{1}$ = $\frac{1}{40}s$

To complete 1km distance with speed = 46km hr it takes time $t_{2}$ = $\frac{1}{46}s$

$Average Speed=\frac{TotalDistance}{TotalTime}$

                       = $\frac{1+1}{(1/40)+(1/46)}$

                       = 42.7906977 m/s