A) 0.31 times r
B) 0.41 times r
C) 0.51 times r
D) 0.61 times r
E) 0.82 times r
Correct Answer: B
Solution :
\[w=\frac{w}{{{\left( 1+\frac{h}{r} \right)}^{2}}}\] \[\Rightarrow \] \[40=\frac{80}{{{\left( 1+\frac{h}{r} \right)}^{2}}}\] \[\Rightarrow \] \[h=0.41\,r\]You need to login to perform this action.
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