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16 April, 06:19

Suppose you are driving to school from your home. During the first 15 minutes you drove with an average speed of 40 miles/hour. Then you realized that you are getting late and started driving at a speed of 50 miles/hour. If the distance between your home and school is 35 miles how long you will take to reach your school? 45 mins O Can not be determined O 30 mins 27 mins O 15 mins

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  1. 16 April, 07:04
    0
    45 mins

    Explanation:

    First phase:

    v = speed of driving = 40 mph

    t = time spent = 15 min = 0.25 h

    d = distance traveled

    distance traveled is given as

    d = v t

    d = 40 x 0.25

    d = 10 miles

    Second phase:

    D = remaining distance to be traveled = 35 - 10 = 25 miles

    v = speed of driving = 50 mph

    t = time spent

    remaining distance traveled is given as

    D = v t

    25 = 50 t

    t = 0.5 h

    t = 30 min

    T = Total time taken to reach the school

    Total time taken is given as

    T = 15 + 30

    T = 45 min
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