If 5 feet of slack is required on each​ end, how long a piece of wire should be​ purchased?

Question

A stereo receiver is in a corner of an 18​-ft by 14​-ft room. Speaker wire will run under a​ rug, diagonally, to a speaker in the far corner. If 5 feet of slack is required on each​ end, how long a piece of wire should be​ purchased?

The wire should be _____ feet long.

​(Round to the nearest​ foot.)

Answer 1

sqrt(18^2+14^2)+10 =

sqrt( 324+196)+10 =

sqrt( 520) + 10

33 feet