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The distance between a and B is 150km. It takes a bus two hours to travel 23 times. If the speed remains the same, how many hours will it take for the rest of the journey?
150 × (1-23) / (150 × 23 / 2) = 150 × 13 / 2 (100 / 2) = 50 / 50 = 1 (hour). A: the rest of the journey will take another hour
The distance between a and B is 300 kilometers. A car from a to B wakes up 90 kilometers in 1.2 hours. At this speed, how many hours can it reach B?
The distance between a and B is 300 kilometers. A car from a to B wakes up 90 kilometers in 1.2 hours. At this speed, how many hours can it reach B?
300÷（90÷1.2）
=300÷75
=4 hours
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