Помогите пожалуйста!
1) n=P*h/A=50*3/160=0.94 (94%) 2) n=P*h/(2*F*h)=600/(2*400)=0.75 (75%) 3) n=m*g*L1/(F*L2)=240*10*0.06/(550*0.3)=0.87 (87%) =====================