Question

A stone falls freely from rest from a height $h$ and it travels a distance $\frac{9h}{25}$ in the last second. The value of $h$ is

• A. 145 m
• B. 100 m
• C. 122.5 m
• D. 200 m

Answer 1

Answer: (C)

122.5 m

Answer 2

$\frac{9h}{25}=\frac{g}{2}(2t-1)$
$\frac{1}{2}gt^2=h$
h = 122.5 m