miles per hour in still water, what is the rate of the current?
WHAT RESOURCES CAN I USE TO ADDRESS QUESTIONS LIKE THIS...
2007-09-14 16:18:46 · 7 answers · asked by maxfashun911 1 in Cars & Transportation ➔ Boats & Boating
I cannot believe the previous answers!
The length of the river is irrelevant. It's all down to the speed of the river.
If the boat is traveling at 15mph from A to B for 1.5 hours it will travel 22.5miles in still water. If it travels 15mph from B to A for 1hour it will travel 15 miles. Therefore the speed of the river is 7.5 mph (the difference between 22.5 and 15).
Also doesn't matter if it's fresh water, sea water, mercury, a river of liquid nitrogen.
Hope this helps Bigpathome.
2007-09-15 13:15:00 · answer #1 · answered by Bigpathome 3 · 0⤊ 2⤋
time = (distance)/(velocity) enable the present be "x" mph. Upstream return and forth velocity = boat velocity in nonetheless water -modern-day velocity = (19-x) via fact the present tries to hold it downstream. So Upstream return and forth time = 15/(19-x) down bypass return and forth velocity = boat velocity in nonetheless water + modern-day velocity = (19+x) via fact the present speeds it up downstream. So Upstream return and forth time = 23/(19-x) Now the circumstances are equivalent so 15/(19-x) = 23/(19-x) fixing for "x" by way of flow multiplication and getting the x words in one area, we get, x = 4 mph. verify: upstream boat velocity 19-4 = 15 mph, it takes a million hour to conceal 15 miles. downstream boat velocity = 19 + 4 = 23 mph, it takes the comparable a million hour to return and forth 23 miles. So the respond is right.
2016-12-13 09:32:25 · answer #2 · answered by blea 4 · 0⤊ 0⤋
Depends on the wind, current of the river if there is a tide to change the speed of the water flow> Rivers are a you guess as it at 15mph and your in a 5 mph current your only moving 10 mph give or take> Take a GPS an you will know><
2007-09-15 06:42:26 · answer #3 · answered by 45 auto 7 · 0⤊ 2⤋
Depends if it fresh water or saltwater as they have different densities. I just go however fast I go and drink Beer or Margaritas and get there when I do. I guess there some technical to figure this, but, most the people I know not worry about math on a boat. Sorry this the best I can do.
2007-09-14 19:46:43 · answer #4 · answered by Snaglefritz 7 · 0⤊ 3⤋
It's called coastal navigation,done with your local coast guard or sea watch or the RNLI It works in multiples of 5.
2007-09-15 00:53:36 · answer #5 · answered by max k 2 · 0⤊ 2⤋
maybe they are against the tide thats why its longer
2007-09-14 23:13:08 · answer #6 · answered by paultech6 4 · 0⤊ 3⤋
try your text book and the tutoring center at your school...
2007-09-14 17:18:17 · answer #7 · answered by madcaprex 2 · 0⤊ 3⤋