Brian travels a distance at a speed of
12 km/h and returns at 9 km/h. If the
total time taken by him is 3 h 30 min, find

Brian travels a distance at a speed of
12 km/h and returns at 9 km/h. If the
total time taken by him is 3 h 30 min, find
the distance he travelled one way..

This is Math question and not Physics.

Pls answer in Step-By-Step way. You’ll get Brainliest also.​

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  1. Answer:

    See below for the answer:

    Step-by-step explanation:

    Let the total distance be x.

    ATQ speeds a=12kmph, b=9kmph

    total time T = 3hr30mins= 3½=7/2

    Avg speed = 2ab/(a+b)

    = 2*12*9/(12+9)

    = 72/7

    Speed = distance/ time

    72/7 = x/(7/2)

    => Total distance x= 36 kms

    Hence distance travelled one way = 36/2 = 18kms

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