Sajid drove for 6 hours at a rate of 60 kmph and for 4 hours at 50 kmph. What is his average speed for the whole journey?

52 kmph 56 kmph 54 kmph 58 kmph

56 kmph

Average speed = $\frac{Total\;distance}{Total\;time}$ Total distance = speed x time                      = (60 x 6) + (50 x 4) = 360 + 200 = 560  Total time = 6 + 4 = 10 Average speed = $\frac{560}{10}$ = 56 km/h