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    Question

    A person travels from the hostel to the college with a

    speed of 15 kmph from the bicycle and arrives at a delay of 2.5 minutes. If he runs a bike with a speed of 20 kmph then it reaches 2.5 minutes. Describe the distance between hostel and college. (In km)
    A 3 Correct Answer Incorrect Answer
    B 4 Correct Answer Incorrect Answer
    C 2 Correct Answer Incorrect Answer
    D 5 Correct Answer Incorrect Answer

    Solution

    As we know, Speed = Distance/time Let us consider the actual time of journey be t hrs, As we know, the distance is same According to the question 15 (t + 2.5/60) = 20 (t-2.5/60) 3 (t + 1/24) = 4 (t-1/24) 3t+ 3/24 = 4t-4/24 ┬а 4t-3t=3/24 + 4/24 тЗТ t = 7/24 Distance = speed ├Ч time Distance = 15 (7/24 + 2.5/60) = 15 (7/24 + 1/24) = 15 ├Ч 8/24 = 5 km The distance between the hostel and the college is 5 km.

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