Samantha travels to her college at 6 km/h and returns at 4 km/h. If her total travel time is 7 hours and 30 minutes, what is the distance between her home and college?
ATQ, Let Speed = Distance/Time Let the required distance = 'd' km d/6 + d/4 = 15/2 (2d + 3d)/12 = 15/2 5d/12 = 15/2 d = 15/2 × 12/5 d = 18 km
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