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      Question

      Neha takes 4 hours to travel from station 'G' to station

      'H' at the speed of 90 km/h. After that, she increases her speed by 30% and takes 2 hours to travel from station 'H' to station 'I'. What is the average speed of Neha while travelling from station 'G' to 'I'?
      A 99 km/h Correct Answer Incorrect Answer
      B 67 km/h Correct Answer Incorrect Answer
      C 37 km/h Correct Answer Incorrect Answer
      D 55 km/h Correct Answer Incorrect Answer

      Solution

      ATQ,

      Distance between station 'G' and station 'H' = 90 ร— 4 = 360 km

      Distance between station 'H' and station 'I' = 90 ร— 1.3 ร— 2 = 234 km

      Total distance travelled by Neha = 360 + 234 = 594 km

      Total time taken by Neha = 4 + 2 = 6 hours

      Average speed of Neha = 594 / 6 = 99 km/h

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