New Click here to Enroll for SIDBI MSME Expert Classes by Experts

    Register

    Question

    A boy goes to school with a speed of 85 km/h and comes

    back with a speed of 40 km/h. find his average speed?
    A 42 km/hr Correct Answer Incorrect Answer
    B 49.5 km/hr Correct Answer Incorrect Answer
    C 54.4 km/hr Correct Answer Incorrect Answer
    D 50 km/hr Correct Answer Incorrect Answer
    E 57.6 km/hr Correct Answer Incorrect Answer

    Solution

    Since the distance travelled by a boy (going to school and coming back from school) is equal. So, average speed = 2xy/(x + y) Average speed = (2 x 85 x 40)/(85 + 40) Average speed = (2 x 85 x 40)/125 = 54.4 km/hr

    Practice Next