A) R/4
B) 3R/4
C) R/2
D) R/8
Correct Answer: A
Solution :
At depth ?d? from the surface of the earth, \[g'=g\left( 1-\frac{d}{R} \right)\] Given \[g'=\frac{75}{100}g\Rightarrow g'=\frac{3g}{4},\]then \[\frac{3g}{4}=g\left( 1-\frac{d}{R} \right)\]which gives\[d=R/4.\]You need to login to perform this action.
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