Answers

  • Brainly User
2015-11-17T21:35:17+05:30
Let s = speed of walking
2/s = travel time at speed s
2/(s+1)= travel time at speed (s+1) 
2/s - 2/(s+1) = 1/6 
Simply equation
s^2 + s -12 = 0
(s+4)(s-3) = 0 
s-3 = 0
s=3 
The speed of walking is 3 km/h
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