A group of hikers is planning a trip that will take them up a mountain using one route and back down using another route. They plan to travel down the mountain at a rate of one and a half times the rate they will use on the way up, but the time each route will take is the same. If they will go up the mountain at a rate of 3 miles per day and it will take them two days, how many miles long is the route down the mountain?  Choose the correct choice from the following answers.
A) 7	B) 8	C) 9	D) 10	E) 11
On the way down, the rate is  1.5*3= 
<gadget id="calculator"> 1.5*3</gadget>
<output>4.5</output>
4.5 miles per day.   The distance of the route down the mountain is   2*4.5= 
<gadget id="calculator">  2*4.5</gadget>
<output>9</output>
9 miles.   The answer is 9.
<result>C</result>
A group of hikers is planning a trip that will take them up a mountain using one route and back down using another route. They plan to travel down the mountain at a rate of one and a half times the rate they will use on the way up, but the time each route will take is the same. If they will go up the mountain at a rate of 3 miles per day and it will take them two days, how many miles long is the route down the mountain?