<PRE><B>Question 602266</B>
Airplane A travels North at 12 mph and Airplane B travels West at 9 mph.
 How far away will the planes be from each other 20 minutes after they left the same airport?
:
Find how far each will travel in 20 min which is 1/3 of an hour
{{{1/3}}} * 12 = 4 mi
{{{1/3}}} * 9 =  3 mi
:
The distance between them will be the hypotenuse
:
d = {{{sqrt(4^2+3^2)}}}
d = {{{sqrt(16+9)}}}
d = 5 mi away from each other</PRE>