Question

It takes 6hrs longer to cross a channel in a ferryboat when one engine of the boat is usd alone than when a second engine is used alone. Using both engines , the ferryboat can make the crossing in 4hrs .How long would it take each engine , working alone ,to power the ferryboat across the channel

Answer 1

Travel time of engine 1 can be expressed as
x + 6 = y

where,
x = travel time of engine 2
y = travel time of engine 1

We set up an equation to show how they work together

x + y = 4

Now use system of equations to solve

Answer 2

thanks alot