Answer:
the number of hours taken is 2
Explanation:
The computation of the number of hours taken is shown below:
As we know that
Distance = travel time × speed
The Guillermo to catch Dorabella be t = T
So the equations would be
9T = 4 + 7T
9T - 7T = 4
2T = 4
T = 2 hours
hence, the number of hours taken is 2