Question 981814
a car leaves a place traveling 30 kilometers per hour. an hour later a second car leaves place A following the first car , traveling 50 kilometers per hour.  how many hours  after leaving place a will it take the second car to over take the first?
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In 1 hour, the 1st car is 30 kms away.
The 2nd cars "gains on it" at 20 km/hr (50-30)
30/20 = 1.5 hours.