Walking 6th of his usual speed, a man is 12 minutes 7 late.

Walking 6 th of his usual speed, a man is 12 minutes
7
late. The usual time taken by him to cover that distance is

Time and speed are inversely proportional.

∴ Usual time ×	7	– usual time = 12 minutes
	6

⇒ Usual time ×	1	= 12 minutes
	6

∴ Usual time = 72 minutes
= 1 hour 12 minutes
Second Method :

t =	12	=	1	hrs.
	60		5

Usual time =	A	× time
	Diff. of A and B

=	6	×	1	= 1	1	hrs.
	(7 − 6)		5		5

= 1 hrs. 12 minutes