Two cars are moving in the same direction with the same speed 30 kmh! They are separated by a distance 5 km. What is the speed of a car moving in the opposite direction if it met these two cars at an interval of 4 minutes ?
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Answer:
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Explanation:
So the relative separation between them (=5km) always remains the same. So vrel. =vc-(-30)=(vC+30)kmhr. ⇒vC=45kmhr.
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