Question

A cruise boat travels 72 miles downstream in 3 hours and returns to its starting point upstream in 12 hours find speed of the stream ?

Answer 1

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Answer 2

Thanks

Answer 3

np what do u think it is ?

Answer 4

@Idkanything u want to help him/her?

Answer 5

@likeabossssssss ya

Answer 6

ok do it just give direct answer ok

Answer 7

ok

Answer 8

@3mar

Answer 9

36 miles

Answer 10

You are wanting the speed of the stream (current). Some facts that you must consider the trip is the same distance each way.
Let x = speed of the stream.
Let y = the speed of the boat (relative to the water)
The combined speed when going down stream is 72/3 from speed equals distance divided by time. The speed was 24 mph downstream.
The speed up stream was 72/12 or 6 mph.
with these facts we can write our equations:
x + y = 24 and
y - x = 6 or -x + y = 6 add the equations eliminating x and solving for y 2y = 30, or y = 15 The speed of the boat is 15 mph. Now subtract the two equations eliminating y and solving for x.
2x = 18 or x = 9, the current is 9 mph.

Answer 11

The speed of the stream is x or 9 mph