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      Question

      β€˜E’ and β€˜F’ are going from place β€˜R’ to

      place β€˜S’, which is 900 km apart. If β€˜E’ started 2.5 hours after β€˜F’ but both of them reached β€˜S’ at the same time, then find the speed of β€˜F’. The difference between their speeds is 10 km/hr.
      A 55 km/hr Correct Answer Incorrect Answer
      B 60 km/hr Correct Answer Incorrect Answer
      C 65 km/hr Correct Answer Incorrect Answer
      D 75 km/hr Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ, ATQ, Let the speed of β€˜E’ be β€˜z’ km/hr Therefore, speed of β€˜F’ = (z – 10) km/hr According to the question, Since speed cannot be negative therefore, z = 60 Therefore, speed of β€˜F’ = z - 10 = 50 km/hr

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