A is twice as fast as B and B is thrice as fast as C is.

A is twice as fast as B and B is thrice as fast as C is. The journey
covered by C in 1 1 hours will be covered by A in
2

Speed of B = x kmph (let)
Speed of A = 2x kmph

Speed of C =	x	kmph
	3

∴	Speed of A	=	2x	= 6
	Speed of C		(x/3)

∴ Required time =	1	of	3	hours
	6		2

=	1	hour = 15 minutes
	4

covered by C in 1	1	hours will be covered by A in
	2