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Answer:
Gravitation for exert on block along slope = Mgsin30
Since net force is 0 (constant speed)
Frictional force = Mgsin30
C(friction) = Frictional Force/Normal Force
Normal Force = Mgcos30
C(friction) = Frictional Force/Normal Force
=Mgsin30/Mgcos30
= tan 30
=0.577
Explanation: