How to calculate a distance with different fraction ratios?

This is the math question for my sixth grader son. The answer is $136$ meters but could not figure it out. Can someone please explain how to solve it. Thank you. Adam first walks $3/8$th of a... more

let 0<θ<1 and -1<x<1. prove that |x(1-θ)/(1+θx)|<1

This question is based on Absolute value of real number

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