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Question

Two trains A and B run in opposite directions. They start from the same point at uniform speeds of 45 km/hr and 50 km/hr. The distance between them after 4 hrs will be:


A

370 km

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B

380 km

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C

390 km

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D

400 km

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Solution

The correct option is B

380 km


Train A and Train B run in opposite directions.

So, we can see that the distance between them is the sum of the distance travelled by them in the given time.

Distance travelled by train A in 4 hrs = speed of train A × time taken

= 45 × 4= 180 km

Distance travelled by train B in 4 hrs= speed of train B × time taken

= 50 × 4= 200 km

Distance between both the trains = Distance travelled by A + Distance travelled by B

= 180 + 200= 380 km


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