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

90/ 2

= 45

Step-by-step explanation:

given

tolal distance= 50+ 40 = 90

tolal hour = 1+1 = 2

so

average mean= tolal distance/ño.of hour

= 90/2

=45