A and B start at the same time with speed of 40 km/hr and

A and B start at the same time with speed of 40 km/hr and 50 km/hr respectively. If in covering the journey A takes 15 minutes longer than B, the total distance of the journey is :

Let the distance be x km

Time taken by A =	x	hrs.
	40

Time taken by B =	x	hrs.
	50

Now,	x	−	x	=	15
	40		50		60

5x − 4x	=	15
200	=	60

∴ x =	15	× 200 = 50km
	60

Second Method :

Distance =	Product of speed	× Diff. in time
	Diff. of speed

=	40 × 50	×	15	= 50km
	50 − 40		60