Questions
The moon's distance from the earth is 360000 km and its diameter subtends an angle of 42' at the eye of the observer. Find the diameter of the moon.
a
2200 km
b
1100 km
c
4480 km
d
4400 km
detailed solution
Correct option is D
Here, angle is very small so diameter ≃ arcHere, θ=42'=42×1600=42×160×π180=7π1800radSo, diameter=Rθ=360000×71800×227=4400 kmTalk to our academic expert!
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