# the moom subtends an angle of 57

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the moon subtends an angle of 57 minute at the base -line equal to the radius of the earth . What is the distance of the moon from the earth ?[ Radius of the earth =6.4 x 106 m]

by (90 points)

parallactic angle , theta =57 '

=(57/60)o

b= Radius of earth =6.4 x 106 m

Distance of the moon from the earth ,

s= b/theta = 6.4 x106 x 60 x180 / 57x pi

s= 3.86 x 108 m