SOLUTION: a candy truck leaves the store at 5:00 am each mornng on its 144 mile route.one day the driver gets a late start and does not leave the store until 5:30 am. to finish his route on
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Question 722710: a candy truck leaves the store at 5:00 am each mornng on its 144 mile route.one day the driver gets a late start and does not leave the store until 5:30 am. to finish his route on time the driver drives 4 miles per hour faster than usual.at what speed does he usually drive ?
Answer by josgarithmetic(39616) (Show Source): You can put this solution on YOUR website!
normal speed r in miles per hour. The difference between 5:00am and 5:30am is 1/2 hour.
____________speed________________time____________________distance
normal_______r__________________________________________144
late________r+4_____________________________________144
The normal time being 1/2 hour more than the late time suggests taking the difference between their expressions. Both expressions may be shown as expressions using r, the rate.
normal time minus late time equals 1/2 hour,
.
Multiply left side and right side by to clear the fractions.
, .
=32 miles per hour --- ANSWER.
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