Formula to figure this PLEASE

[mjmazza0427]

Your ship has steamed 1940 miles at 21 knots using 635 tons of fuel oil. The distance remaining to your next port is 1833 miles. If you increase speed to 25 knots, how much fuel will be needed to reach that port.

Please show me the formula to use.

 

[mjmazza0427]

Anyone?

Is there anyone who can help?

 

[DrPhil]

Your ship has steamed 1940 miles at 21 knots using 635 tons of fuel oil. The distance remaining to your next port is 1833 miles. If you increase speed to 25 knots, how much fuel will be needed to reach that port.

Please show me the formula to use.

You have not given enough information. Do you have a previous problem that told you how fuel consumption varies with speed?

If you need real-time (Live) help, you might try
www.PATHwhelp.org > "Live Help"

 

[mjmazza0427]

should remain constant

fuel consumption should remain constant per knot of speed... the answer given is 850 tons of fuel but I have yet to figure out how this was derived. Thanks!

 

[DrPhil]

fuel consumption should remain constant per knot of speed... the answer given is 850 tons of fuel but I have yet to figure out how this was derived. Thanks!

"Fuel consumption per knot is constant" means that consumption is proportional to speed.

At a speed of 21 knots, 635 tons of fuel was consumed going 1940 miles.

Find the rate of consumption at 21 knots, and use a ratio to find the rate at 25 knots.

Using that rate, find how much fuel to go another 1833 miles.

If you need more help, show us your work so we can see where you are stuck. It will help to put UNITS, such as "tons per mile," on every number.