A motorboat can maintain a constant speed of 15 mph

sagnuhh

sagnuhh

Answered question

2021-08-15

A motorboat can maintain a constant speed of 15 mph relative to the water.
The boat makes a trip upstream to a certain point in 15 minutes. the return trip takes 10 minutes.
What is the speed of the current?

Answer & Explanation

ensojadasH

ensojadasH

Skilled2021-08-16Added 100 answers

Let x is the speed of the current.
Using the following formula: s= v*t, where v - speed, t - time, s - distance
We have:
(15x)15=(15+x)10
Then:
225 - 15x = 150 + 10x
And
25x = 75
So, x = 3 mph

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