Answer:
169.74 N
Explanation:
Given,
Mass of the girl = 30 Kg
angle of the rope with vertical, θ = 30°
equating the vertical component of the tension
vertical component of the tension is equal to the weight of the girl.
  T cos θ = m g
  T cos 30° = 30 x 9.8
  T = 339.48 N
Tension on the two ropes is equal to 339.48 N
Tension in each of the rope = T/2
                                            = 339.48/2 = 169.74 N
Hence, the tension in each of the rope is equal to 169.74 N
 
        
             
        
        
        
Explanation:
its hard to explain its very complex but its so they can function properly
 
        
             
        
        
        
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You draw a straight line from the start point to the end point. It doesn't matter what route was actually followed for the trip.
        
             
        
        
        
If light travels from oil to water at an angle, what happens to the direction of the light ray in water with respect to the normal, is it moves away from the normal.