From an island, it is possible to reach the mainland by either Ferry P or Ferry Q. Ferry P travels for 3 hours at 6 kilometers per hour, while Ferry Q takes a route that is two times longer. If Ferry P is slower than Ferry Q by 3 kilometers per hour, how many hours longer is the journey of Ferry Q compared with the journey of Ferry P? Choose the correct option
A) 1  B) 2  C) 3  D) 4  E) 5
The distance traveled by Ferry P is 18 km.   Then the distance traveled by Ferry Q is 36 km. Ferry Q travels at a speed of 9 kph. The time of the journey for Ferry Q is  36/9= 
<gadget id="calculator"> 36/9</gadget>
<output>4</output>
4 hours, which is 1 hour more than Ferry P. The answer is 1.
<result>A</result>
From an island, it is possible to reach the mainland by either Ferry P or Ferry Q. Ferry P travels for 3 hours at 6 kilometers per hour, while Ferry Q takes a route that is two times longer. If Ferry P is slower than Ferry Q by 3 kilometers per hour, how many hours longer is the journey of Ferry Q compared with the journey of Ferry P?