Question 557375
A car traveled at 50km/hr for 4 hours and at 60km/hr for 3 1/2hours. What was the average speed for the whole journey?
:
Average speed = total distance/total time
:
a = {{{((50*4)+(60*3.5))/(4+3.5)}}}
a = {{{(200+210)/(7.5)}}}
a = 54{{{2/3}}} km/hr, average speed for the trip