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Two cars are moving in the same directio...

Two cars are moving in the same direction with the same speed `30 km//hr`. They are separated by a distance of `5 km`, the speed of a car moving in the opposite direction of it meets these two cars at an interval of `4` minutes, will be.

A

`40km//hr`

B

`45km//hr`

C

`30km//hr`

D

`15km//hr`

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The correct Answer is:
B
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