<PRE><B>Question 1164511</B>
a man walks 2 hours at a certain speed .he then cycles at 3 times that speed for 4 hours he goes 77 km altogether.find the speed at which he walks  
------------
w = walking speed
t = time walking = 2

---
2w + 3*w*4 = 77
14w = 77
w = 5.5 km/hr


</PRE>