SOLUTION: A certain trip took 40 min to complete. If half the distance was 100 and the other half at 60, what's the distance traveled during the trip?
a) 68 b) 50
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a) 68 b) 50
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Question 186698: A certain trip took 40 min to complete. If half the distance was 100 and the other half at 60, what's the distance traveled during the trip?
a) 68 b) 50
You can put this solution on YOUR website! A certain trip took 40 min to complete. If half the distance was 100 and
the other half at 60, what's the distance traveled during the trip?
:
Let d = half the distance
:
Write a time equation: (Time = dist/speed) Change 40 min to hr
: + =
Multiply equation by 300
300* + 300* = 300*
Results:
3d + 5d = 100(2)
8d = 200
d =
d = 25 mi is half the dist
obviously
50 mi is the total distance
;
;
Check solution; find the times at each speed:
25/100 = .25 hr
25/60 = .4167 hr
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total = .667 hr which is 40 min
