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Sagot :

14 hours

Explanation:

Trip from A to C:

Total distance from A to C = 175 miles

Speed from A to B = 13 miles per hour

Speed from B to C = 12 miles per hour

Speed = distance/time

distance = speed × time

distance From A to B + distance from B to C = Distance from A to C

Since the time for both distance is the same, let time = t

13 × t + 12 × t = 175

13t + 12t = 175

25t = 175

divide both sides by 25:

25t/25 = 175/25

t = 7

Each trip took 7 hours

The entire trip took = 7 hours from A to + 7 hours from B to C

The entire trip took = 7 + 7 = 14 hours