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 4 solutions by josmiceli, mananth, MathTherapy, ikleyn:
Answer by josmiceli(19441)   (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:

km
For Boris:

km

Answer by mananth(16949)   (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=
=> 5.4 km

Answer by MathTherapy(10719)   (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?

Answer by ikleyn(53618)   (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?
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Regarding the solution in the post by @mananth, I'd like to notice that the problem
does not require to calculate the distance between the brothers after 30 minutes.

So, this calculation is unnecessary and performed by @mananth without any real necessity.