Posted by Felix Ferrer on Tuesday, October 2, 2007 at 6:15pm.
distance = rate x time
Calculate time for each 50 mile increment. Add the times together to obtain total time.
then 100/total time = average rate. Post your work if you get stuck.
i can't figure it out???
distance = rate x time
d for 40 mph vehicle = 50 mi = 40 mi/hr x time.
solve for time for 40 mph car = 50/40 = 5/4 hour.
d for 60 mph car = 50 mi = 60 mi/hr x t
solve for t for 60 mph car = 50/60 = 5/6 hr.
Add the times together.
5/4 + 5/6 = 1.250 + 0.833 = 2.083 hours total time.
distance traveled in total time = 100 miles. Average speed = 100 mi/2.083 hours = ??
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