AlgebraVery hardTime for two vehicles to be a given distance apart
Algebra practice question
A train and a bus leave the same station at the same time and travel in opposite directions along a straight route, the train at 80 kilometres per hour and the bus at 50 kilometres per hour. After how many hours will they be 260 kilometres apart?
Answer: 2
They separate at 80 + 50 = 130 km per hour, so 260 km takes 2 hours.
Common wrong answers
- If you answered 8.67
- 8.67 divides 260 by 30, the difference in speeds, which applies only if they travel the same way.
- If you answered 3.25
- 3.25 divides 260 by 80.
- If you answered 5.2
- 5.2 divides 260 by 50.
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