You can only change one variable in an experiment true or false
1 answer:
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Answer:
the speed at which Noelle walks from point B to A, v=7.5 kilometers per hour
Explanation:
In this question we have given
average speed for the entire trip,S = 6 kilometers per hour
Speed of Noelle while walks from point A to B= 5 kilometers per hour
Therefore, time taken by Noelle to walks from point A to B,
Let us consider distance between A and B is d.
Therefore total distance covered in moving from point A to B and then moving back from point B to A, =
Let v be the speed at which Noelle walks from point B to A
Therefore time taken by Noelle to walks from point B to A,
we know that average speed S is given as
................(1)
here, x (=2d) is total distance
and t (= ) is total time
put values of S, x and t in equation 1
on solving we get,
v = 7.5 kilometers per hour
Therefore, the speed at which Noelle walks from point B to A, v=7.5 kilometers per hour