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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 × 4 = 360 km

    Distance between station 'H' and station 'I' = 90 × 1.3 × 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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