Question 544511
Boat speed	=	20	mph										
current  speed	=	x	mph										
													
speed against	current	20	-	x									
speed with	current	20	+	x									
													
Distance against	current	2	miles										
Distance with 	current	3	miles										
													
t=d/r	time against = time with		current										
2/(20-x	)=3/(20	+x)
2(20+x	)=	3( 20-x	)			
40+2x	=	60-3x 					
3x	+2x=20								
5x=20										
/5												
x =	4	mph	current  speed