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    Question

    Sheetal rides a bike at an average speed of 40 kmph and

    reaches her destination in 5 hours. Hemlata covers the same distance in 4 hrs. If Sheetal increases her average speed by 10 kmph and Hemlata increases her average speed by 10 kmph, what would be the difference in their time taken to reach destination?
    A 55 min Correct Answer Incorrect Answer
    B 48 min Correct Answer Incorrect Answer
    C 50 min Correct Answer Incorrect Answer
    D 40 min Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    SheetalтАЩs speed= 40 km/hr. Time taken by Sheetal = 5 hrs. Distance = Speed ├Ч ┬аTime = 40 ├Ч 5 = 200 km. тИ┤ Distance covered by Hemlata ┬а= 200 ┬аkm. Time taken by Hemalata = 4 hrs. тИ┤ HemlataтАЩs Speed = (Distance )/Time = (200 )/4 = 50 km/hr. SheetalтАЩs increased speed= 50 km/hr. тИ┤ Time taken by Sheetal = (200 )/50 = 4 hrs. ┬аHemlataтАЩs increased speed = 60 km/hr. тИ┤ Time taken by Hemlata = (200 )/60 = 31/3 hrs. = 3hrs 20 minutes. тИ┤ Required difference = 4 hrs тАУ 3hrs 20 minutes = 40 minutes.

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