How fast must a car travel to overtake a bus in 5 hours, if the bus is averaging 30 kilometers per hour and left 3 hours before the car?
2 answers:
Answer:
The car must move 48 km/h.
Step-by-Step Explanation
Denote x km/h the speed of the car. 5*x km while the bus for 5 hours travel the distance:
5*30=150 km ,since the bus left 3 hours before the car its total distance from the car is 150+3*30=240 km. The car overtake the bus when 5*x=240 where x=48 km/h.
Let the speed of the car be km/h
Car travel to overtake a bus in 5 hours = km
The bus for 5 hours travel the distance:
km
Where the bus left 3 hours before the car its total distance from the car is :
km
The car overtake the bus when
Answer: The car must move 48 km/h.
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