Walking at6th of his usual speed a man 7 is 25 minutes

Walking at 6 th of his usual speed a man
7
is 25 minutes late. His usual time to cover this distance is

1. 2 hours 30 minutes
2. 2 hours 15 minutes
3. 2 hours 25 minutes
4. 2 hours 10 minutes

Time and speed are inversely proportional.

∴	7	× Usual time – Usual time = 25 minutes
	6

⇒		7	− 1		= 25 minutes
		6

⇒ Usual time ×	1	= 25 minutes
	6

∴ Usual time = 25 × 6
= 150 minutes
= 2 hours 30 minutes
Second Method :
Here, A = 6, B = 7,

t =	25	=	5	hrs.
	60		12

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

=	6	×	5	=	5	hrs.
	(7 − 6)		12		2

= 2 hours 30 minutes