Question 613837
Plane  	speed	x	mph				
wind   	speed	15	mph				
..							
against	wind   	x	-	15	mph		
with	wind   	x   	+	15	mph		
							
Distance against	wind   	242					
Distance with	wind   	253					
Time = same	equate the time against with time with current						
t=d/r							
242	/(x-	15	)=	253	/(x+	15	)
242	*(x+	15	)=	253	*(x-	15	)
242	x  	+	3630	=	253	x	-3795
242	x  	-253	x   	=	-3795	+	-3630
-11	x  	=	-7425				
/	-11						
	x=	675	mph				
m.ananth@hotmail.ca