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algol13
2 years ago
15

The rules for a race require that all runners start at $A$, touch any part of the 1200-meter wall, and stop at $B$. What is the

number of meters in the minimum distance a participant must run
Mathematics
1 answer:
mixer [17]2 years ago
5 0

Let the place that they touch be x meters from the 300 m wall

Then the distance from the 500 m wall will be 1200 - x

Then....the total distance, D, can be expressed asD = sqrt [ x^2 + 300^2 ] + sqrt [ (1200 - x)^2 + 500^2 ]

This can be solved with Calculus, but it's a little messy

The graph shows that the minimum distance is achieved when x = 450m

And the minimum distance  ≈  1442 m

By the way......we can show that this is true if

arctan [ 300 / 450]   =  arctan [ 500 / 750 ]  ......and this is true  !!!!

Learn more about Distance:

brainly.com/question/12356025

#SPJ4

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