Answer:
I didn't know and I tried ♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️
Your answer would be 33 lb. hope that helped
The answer is 40 is 80% of 50 ☺
Here y=1/2 x=pi/3=60°
y=cosx
1/2=cos60° and cos60°=1/2
so LHS=RHS
so that point is on curve y=cosx