1.

Assuming the distance of the earth from the moon to be 38,400 km andthe angle subtended by the moon at the eye of a person on the earth to be31’, find the diameter of the moon.

Answer» Diameter of moon can be given by,
`l = r theta`
Here, `r` = distance between moon and earth `=38400 km`
`theta` = Angle in radians `= 31*1/60*pi/180`
`:. l = 31*1/60*pi/180**38400 = 364.32(approx)`
So, the diameter of the moon is approximately `364.32` km.


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