Q: A racing automobile travels a specific distance in 5 hours at 320 km/h. To go the same distance in 5/3 hours, it must travel at the following speed:

A 800 km/hr
B 960 km/hr
C 450 km/hr
D 1000 km/hr
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Answer: B


The relationship between speed and time is inversely proportional, which means that as one increases, the other decreases.

In this case, the ratio of time is 5:5/3, which means that for every 5 units of time, there are 5/3 units of time. If we increase the ratio of time to 3:1, this means that for every 3 units of time, there is 1 unit of time.

Since speed is inversely proportional to time, this means that the ratio of speed is 1:3. This means that for every 1 unit of speed, there are 3 units of speed.

If the speed required is 320 km/hr, then the required speed to cover the distance in 3 units of time would be 320 km/hr * 3 = 960 km/hr.

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Time and Distance

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