Question

A source of light is hung $hmts.,$ directly above a straight horizontal path on which a boy ${}^{\prime }{a}^{\prime }$ mts., in height is walking. If a boy walks at a rate of $bmts/sec.$ from the light then the rate at which his shadow increases.

• A. $\frac{ab}{h-a}mt/sec$
• B. $\frac{ab}{h+a}mt/sec$
• C. $\frac{ab}{2(h-a)}mt/sec$
• D. $\frac{ab}{2(h+a)}mt/sec$

Answer 1

The correct option is A $\frac{ab}{h-a}mt/sec$