Question 1179655
	swift	speed=	x	km/h					
	wind	speed=	y	km/h					
	with wind speed=		(x+y)						
	against wind speed		(x-y)						
	d=	42		with wind					
	42	/	(x+y) 	=	0.3				
	divide by	0.3							0.3
	140	/	(x+y) 	=	1				
	(x+y) 	=	140	............1					
	d=	=	27						
	18/(x-y)	=	0.3						
	divide by	0.3							
	60	/(x-y)	=	1					
		x	-		y	=	60	.............2	
	add up (1) & (2)								
	2	x	=	200					
	/	2							
	x=	100	mph	speed of	swift	without wind			
	plug value of x in (1)								
	we get	y=	40	mph	speed of	wind