Jambmaths question:
The length a person can jump is inversely proportional to his weight. If a 20kg person can jump 1.5m. Find the constant of proportionality
Option A:
60
Option B:
30
Option C:
20
Option D:
15
Jamb Maths Solution:
$\begin{align} & l\propto \frac{1}{w} \\ & l=\frac{k}{w}\text{ (where }k=\text{ proportionality constant)} \\ & \text{when }w=20kg,\text{ }l=1.5m \\ & 1.5m=\frac{k}{20kg} \\ & k=1.5m\times 20kg=30kgm \\\end{align}$
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