Question

A boat moves 9 kilometers upstream in the same amount of time it moves 19 kilometers downstream. If the rate of the current is 9 kilometers per hour, find the rate of the boat in still water.

Answer 1

\[\frac{9}{r-9} = \frac{19}{r+9}\] ?

Answer 2

These are the Answer choices!

A. 17 km/hr
B. 9 km/hr
C. 8 km/hr
D. 25 km/hr

Answer 3

9r + 81 = 19r - 171
10r = 252
r = 25.2

Answer should be either A or D, but I think it's D

Answer 4

Oh I have no ideal! LOL

Answer 5

Correct answer is D.

Answer 6

So my equation was right

Answer 7

Yes! Thank you!