David's average driving speed for 5 hours generally was 55 km per hour work during his first two hours of general he drove at 60 km per hour and last two hours he drove at 50 km per hour what was the his speed for the fifth hour of the journey
Answers
Answered by
6
The average of the speeds is40 mph+60 mph2=50 mphso the total trip time should be, by the definition of average speed,240 mi50 mph=4.8 hours.
However, this is wrong, because the trip actually took 3+2=5 hours.
What did I do wrong, and what is the correct way to calculate the average speed?
However, this is wrong, because the trip actually took 3+2=5 hours.
What did I do wrong, and what is the correct way to calculate the average speed?
shyama642:
Its wrong
Answer is 55 km
Similar questions