Respuesta :

let L be the total Length, so L=L1 + L2 + L3L1 is the first length
according to the figure L1 = a / sinβ = 25/ 0.57= 43.85 ft                                     L3= a/sinα = 25 / 0.42=59.5 ft, for L2=b -L1-L3=96.62
so the total length is L=L1 + L2 + L3=  200ft