A 200-N Crate Rests on an Ramp;the Maximum Angle Just $\degree$

Multiple Choice

A 200-N crate rests on an ramp;the maximum angle just before it slips is 25 $\degree$ with the horizontal.What is the coefficient of static friction between crate and ramp surfaces?

A) 0.11
B) 0.21
C) 0.38
D) 0.47