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Difference in distance covered = (240 - 180) = 60 km

But since speeds differ by 20 kph, difference in distance is (20 x #hours).

60 = 20 x #hours

#hours = 60/20 = 3 hours.

Fast car covers 240 in 3 hours ---> 80 kph

Slow car covers 180 in 3 hours ---> 60 kph

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15y ago

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