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    Question

    AirAsia covered the distance between destination II and

    III at the speed of 94 km/hr and that between destination III and IV at the speed of 54 km/hr. what is its average speed of this journey? In the following table eight destinations - I, II, III, IV, V, VI, VII and VIII - have been given. A car crosses all the destinations if it starts from destination I to destination VIII. Question mark (?) in the table show the missing figures. Study the table carefully and answer the following given questions.  
    A 54 kmph Correct Answer Incorrect Answer
    B 48 kmph Correct Answer Incorrect Answer
    C 60 kmph Correct Answer Incorrect Answer
    D 70 kmph Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Time taken between destinations II and III = `376/94`  =   4 hours Time taken between destinations III and IV =  `324/54`   =  6 hours  Average speed = total distance / total time = `(376+324)/(4+6)`  = 70 km/h

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