Question

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.​

Answer 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