\(w\)=(40)(9.81)
\(w\)= 392.4\(N\)
TEBcos 30°=TED
TEBsen30°=TAE
TED = (392.4)(cos30°)=339.82\(N\)
TAE = (392.4)(sen30°)= 196.2\(N\)
\(w=mg\)
\(mg=w\)
\(m=\frac{g}{w}\)
\(m=\frac{196.2}{9.81}=20kg\)