<PRE><B>Question 1054352</B>
pearl walks from home to school at an average speed of 6km per hour, and jogs home at an average speed of 12km per hour. If her whole trip takes an hour, how far is it from home to school. 
-----
To school DATA:
rate = 6 km/h ; time = t hrs ; distance = r*t = 6t km
------------------
To home DATA:
rate = 12 km/h ; time = (1-t)hrs ; distance = 12(1-t) = 12-12t km
------------------
Equation:
dist = dist
6t = 12-12t 
18t = 12
t = 2/3 hrs
-----
Ans: distance = 6t = 6(2/3) = 4 km
-------------
Cheers,
Stan H.
</PRE>