Question

a car travels a certain distance with a speed of 50 km/h and returns with a speed of 40km/h .calculate the average speed of the whole journey.

Answer 1

hey here is ur answer

average speed =$\frac{total distance covered}{total time taken}$

=$\frac{40+50}{1+1}  =\frac{90}{2}  =45km/h$

i hope this helps u