एका चालकाने १८० किमी अंतर ताशी ६० किमी वेगाने जाताना व ताशी ४० किमी वेगाने येताना गाडी चालवली, तर गाडीचा ताशी सरासरी वेग किती किमी ?

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एका चालकाने १८० किमी अंतर ताशी ६० किमी वेगाने जाताना व ताशी ४० किमी वेगाने येताना गाडी चालवली, तर गाडीचा ताशी सरासरी वेग किती किमी ?

1. ४८
2. यांपैकी नाही
3. ४५
4. ५०​

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Sophia 1 month 2021-08-11T14:48:11+00:00 1 Answer 0 views 0

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    0
    2021-08-11T14:49:26+00:00

    Question : If a driver drives a distance of 180 km at a speed of 60 km per hour and a speed of 40 km per hour, what is the average speed of the vehicle per hour ?

    1. 48

    2. None of these

    3. 45

    4. 50

    Solution :

    we know that,

    • Average speed = (2 * S1 * S2) / (S1 + S2)
    • S1 = first speed .
    • S2 = second speed .

    given that ,

    • S1 = 60 km/h .
    • S2 = 40 km/h .

    so,

    → Average speed = (2 * 60 * 40) / (60 + 40) = (2 * 60 * 40) / 100 = 2 * 6 * 4 = 48 km/h (Option 1) (Ans.)

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