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      Question

      A boy cycles to his school at 40 km/h and comes back at

      30 km/h. If the total time for going and coming back is 210 minutes, find the distance between his home and school.
      A 48 km Correct Answer Incorrect Answer
      B 25 km Correct Answer Incorrect Answer
      C 84 km Correct Answer Incorrect Answer
      D 77 km Correct Answer Incorrect Answer

      Solution

      ATQ, Let the required distance be 'D' km. So, (D/40) + (D/30) = (210/60) Or, (7D/120) = (210/60) Or, 'D' = 42 ├Ч 2 = 84 km

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