SOLUTION: two brothers leave their house at the same time. alex runs due east at a constant speed of 10km per hour, and Boris walks due south at a constant speed of 4km per hour. How far has

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Question 1155527: two brothers leave their house at the same time. alex runs due east at a constant speed of 10km per hour, and Boris walks due south at a constant speed of 4km per hour. How far has each brother travelled after 30 minutes?
Found 3 solutions by josmiceli, mananth, MathTherapy:
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Convert minutes to hours
[ 30 min ] x [ 1 hr / 60 min ] = [ 1/2 hr ]
For Alex:
+d+=+10%2A%281%2F2%29+
+d+=+5+ km
For Boris:
+d+=+4%2A%281%2F2%29+
+d+=+2+ km

Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
Alex East => 10 km/h
after half an hour =>5 km
Boris South => 4 km/h
after half an hour =>2 km


Walking at right angles
Apply Pythagoras theorem
distance=sqrt%282%5E2%2B5%5E2%29
=> 5.4 km

Answer by MathTherapy(10549) About Me  (Show Source):
You can put this solution on YOUR website!

two brothers leave their house at the same time. alex runs due east at a constant speed of 10km per hour, and Boris walks due south at a constant speed of 4km per hour. How far has each brother travelled after 30 minutes?