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Depends how long after the 60kmh car starts to chase the other car.

For 1 hour after:

v=d(divided by)t

40=d(divided by)1

d=40x1

d=40km

40kmh car travels in 40 km in 1 hour.

Difference between the speeds: 60-40=20kmh

If the 60kmh car is said to be going at 20kmh instead, by proportion the 40kmh car will be travelling at 0kmh (not moving at all)

So we only need to find out how long a vehicle travelling at 20kmh will cover 40kmh in...

t=d(divided by)v

t=20(divided by)40

t=0.5hours

Therefore the 60kmh hour car would catch it up in 30minutes.

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13y ago

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