In order to get to the library from his home, Leslie drove 15 kilometers east and 20 kilometers south. Leslie's sister Kira found a shorter way home, as shown by the dotted line. How much shorter was the way Kira found?
http://media.apexlearning.com/Images/200709/14/64e982e0-8159-493b-b6f0-771384cb8519.gif

A. 10 kilometers
B. 20 kilometers
C. 25 kilometers
D. 15 kilometers

Question

In order to get to the library from his home, Leslie drove 15 kilometers east and 20 kilometers south. Leslie's sister Kira found a shorter way home, as shown by the dotted line. How much shorter was the way Kira found?
http://media.apexlearning.com/Images/200709/14/64e982e0-8159-493b-b6f0-771384cb8519.gif

 		A.	10 kilometers
 		B.	20 kilometers
 		C.	25 kilometers
 		D.	15 kilometers

anonymous · Answer

@KendrickLamar2014

anonymous · Answer

i guess it's 10 kilometers

kendricklamar2014 · Answer

Im not sure about this one :( @Nnesha @TheSmartOne

anonymous · Answer

i.e means leslie drove 15+20=35 km
but if u observe dotted line the triangle become rifght angle triangle
so dotted line distance=sqrt(15^2+20^2)=sqrt(625)=25
so 35-25=10

anonymous · Answer

my guess is right ^_^ thanks ^_^