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 6 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) 16	B) 17	C) 18	D) 19	E) 20
On the way down, the rate is  1.5*6= 
<gadget id="calculator"> 1.5*6</gadget>
<output>9</output>
9 miles per day.   The distance of the route down the mountain is   2*9= 
<gadget id="calculator">  2*9</gadget>
<output>18</output>
18 miles.   The answer is 18.
<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 6 miles per day and it will take them two days, how many miles long is the route down the mountain?