Math Help - Inverse Variation

1. Inverse Variation

The weight of an object varies inversely with square of distance from earth's center (3960 miles). A man weighs 250 lbs on the surface of the earth. How much would he weigh in an airplane flying at 30,000 ft?

2. Let W denote the weight of the man. Then from the relationship given in the problem with d denoting the distance from the core of earth gives :

$W \alpha \frac{1}{d^2}
\Rightarrow 250 \cdot \frac{1}{\frac{3965.68}{3960}^2}=249.28
$

3. ok..............

Originally Posted by Pur
Let W denote the weight of the man. Then from the relationship given in the problem with d denoting the distance from the core of earth gives :

$W \alpha \frac{1}{d^2}
\Rightarrow 250 \cdot \frac{1}{\frac{3965.68}{3960}^2}=249.28
$
What a nice job!