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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Question 186781: 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
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
D=RT
T=D/R
2/3=(D/2)/100+(D/2)/60
2/3=D/2*1/100+D/2*1/60
2/3=D/200+D/120
2/3=(120D+200D)/(200*120)
2/3=320D/24,000
3*320D=2*24,000
960D=48,000
D=48,000/960
D=50 MILES IS THE DISTANCE OF THE TRIP.