D A little longer than a yard (about 3 ft)
        
             
        
        
        
Power = Iω (constant) as they are connected together, since effort axle has large radius than resistance axle, so moment of inertia of effort axle is also more as compared to resistance axle, so angular speed of effort axle is less than the resistance axle. So answer is B. resistance axle  will have more angular speed as its moment of inertia is less for the same power.
        
             
        
        
        
PM me the statements, and i'll answer it then.
 
        
             
        
        
        
Answer:
Explanation:
  For entry of light into tube of unknown refractive index 
sin ( 90 - 25 ) / sinr = μ , μ is the refractive index of the tube , r is angle of refraction in the medium of tube 
r = 90 - C where C is critical angle between μ and body medium in which tube will be inserted. 
sin ( 90 - 25 ) / sin( 90 - C)  = μ
sin65 / cos C = μ
sinC = 1.33 / μ  , where 1.33 is the refractive index of body liquid. 
From these equations
sin65 / cos C = 1.33 / sinC 
TanC = 1.33 / sin65
TanC = 1.33 / .9063
TanC = 1.4675
C= 56°
sinC = 1.33 / μ
 μ = 1.33 / sinC
= 1.33 / sin56
= 1.33 / .829
μ = 1.6   Ans