y/0.3048*sqrt(5/7)*2/7*(1 (1 0)*sqrt(5/7))/(1 sqrt(5/7)) 11*(y/1.83)^2*5/7*(1 0)*abs(1 0)=20

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.