Question
A car travels from point A to point B at an average
speed of 80 km/h. On the return journey from point B to point A, its average speed decreases by 25% due to bad weather. If the total travel time for both trips is 10.5 hours, what is the distance between point A and point B?Solution
Speed of car from point B to point A = 75% of 80 = 60 km/h 
Total distance covered in 10.5 hours = 10.5 × 480/7 = 720 km Distance from point A to point B = 720/2 = 360 km
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