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      Question

      At the same time A and B start moving towards each other

      from two different places, 240 km apart. The ratio of the speeds of A and B is 5: 7, and the speed of B is 84 km/h. After how many minutes will A and B meet each other?
      A 80 minutes Correct Answer Incorrect Answer
      B 100 minutes Correct Answer Incorrect Answer
      C 120 minutes Correct Answer Incorrect Answer
      D 90 minutes Correct Answer Incorrect Answer

      Solution

      Ratio of Speeds of A and B =5:7 Speed of A and B=5x and 7x ATQ- 7x =84km/h x =12 Then Speed of A=5Γ—12=60km/h. Relatives speed of A and B =84+60=144. So, now time taken by A and B meet each other=240/144

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