Question 471467
distance = x							
Time downhill		x/	20				
Time uphill		x/	12				
extra time while uphill =			2.00	hour 			
x/	12	-	x/	20	=	2.00	
							
LCD = 7350 	240						
multiply by LCD							
20	-	12	x   	=	2.00	*	240
8	x= 	480					
/	8						
x=   	60 niles

Time uphill = 60/12=5 hours