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Two cars travel from city A to city B at a speed of 42 and 60 km/hr respectively. If one car takes 2 hours lesser time than the other car for the journey, then the distance between City A and City B is?

A420 km

B400 km

C224 km

D280 km

Answer:

D. 280 km

Read Explanation:

Let the distance between the city A and city B be ‘x’ km. Speed of car 1 = 42 km/hr Speed of car 2 = 60 km/hr Time = Distance/Speed ⇒ Time taken by car 1 to travel from city A to city B = x/42 ⇒ Time taken by car 2 to travel from city A to city B = x/60 ⇒ (x/42) - (x/60) = 2 ⇒ x = 280 km


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