SOLUTION: A motorboat takes 3 hours to travel to it's destination with a current of 5 mph. The return trip against the same current takes 4 hours. How fast is the motorboat in still water?

Question 767529: A motorboat takes 3 hours to travel to it's destination with a current of 5 mph. The return trip against the same current takes 4 hours. How fast is the motorboat in still water?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
A motorboat takes 3 hours to travel to it's destination with a current of 5 mph. The return trip against the same current takes 4 hours. How fast is the motorboat in still water?
***
let x=speed of motorboat in still water
x+5=speed of motorboat with the current
x-5=speed of motorboat against the current
distance=speed*travel time
3(x+5)=4(x-5)
3x+15=4x-20
x=35
How fast is the motorboat in still water? 35 mph
RELATED QUESTIONS
Christina�s motorboat took 3 hours to make a trip downstream with a 6-mph current. The... (answered by mananth)

Mia's motorboat took 3 hours to make a trip downstream with a 6 mph current. the return... (answered by stanbon)

A motorboat took 3 hours to make a downstream trip with a current of 6km/h. The return... (answered by orca)

A motorboat took 3 hours to make a downstream trip with a 6km/h current. The return trip... (answered by ankor@dixie-net.com)

a motorboat took 2 hours to make a downstream trip witha 5 mph current. the return trip... (answered by josmiceli)

Sailing with the current, a boat takes 3 hours to travel 60 miles. The return trip,... (answered by friesr)

A boat can travel from its dock to a town downriver with a 7 mph current in 10 hours. The (answered by Grinnell)

A motorboat at full throttle takes two hours longer to travel 75 miles against the... (answered by RAY100)

With Current, a motorboat travels 60 mi in 3 h. Against the current, it takes 2h longer... (answered by solver91311)