Question

In traveling from city A to city B, Jojo drove for 1 hour at 50 kph and for 3 hours at 60 kph. What was his average speed for the whole trip?

please help! thanks :)

Answer 1

(50X1+60X3)/(1+3) =230/4=57.5

Answer 2

Average speed=Total distance/total time
Distance=Time*speed

Answer 3

Average Speed = Total Distance / Total time taken

To find total distance covered, lets use this equation:

d = v x t
d = 50 x 1 = 50m **** This is the distance covered when he was travelling for 1 hour

+

d = 60 x 3 = 180m **** This is the distance covered when he was travelling for 3 hours

So lets add the distances together 50 + 180 = 230m

Great! So lets use our original equation for finding the average speed.

Average speed = 230 / 4
= 57.5 kmph :)

Answer 4

thanks for your help :)