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August 2, 2014

August 2, 2014

Posted by **stephanie** on Wednesday, September 28, 2011 at 7:16pm.

- math -
**Steve**, Thursday, September 29, 2011 at 12:19amUse your good old Pythagorean theorem:

H = 20

L = D+4

L^2 = H^2 + D^2

(D+4)^2 = 20^2 + D^2

D^2 + 8D + 16 = 400 + D^2

8D = 384

D = 48

L = 52 ft

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