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# Two airplanes leave the same airport. One heads north, and the other heads east. After some time, the northbound airplane has travelled 27 k

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Two airplanes leave the same airport. One heads north, and the other heads east. After some time, the northbound airplane has travelled 27 kilometres, and the eastbound airplane has travelled 36 kilometres. How far apart are the two airplanes?

Guest May 16, 2017
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The distance between them  will be the hypotenuse of a right triangle with legs  of 36 and 27 km

This distance  =  √ [ 36^2  + 27^2 ]  =  45 km

BTW..... you might recognize this  as a multiple  of  a  3 - 4 - 5   right triangle

Multiplying  each side by 9, we have :

27  -  36   -  45

CPhill  May 16, 2017

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