Question

A man 6' tall moves away from a source of light 20′ above the ground level, his rate of walking being 4 m.p.h. At what rate is the tip of his shadow moving ?

• A. $\frac{12}{7}$
• B. $\frac{3}{7}$
• C. $\frac{40}{7}$
• D. None of these

Answer 1

Answer: (C)

$\frac{40}{7}$

Answer 2

The correct option is (C) : $\frac{40}{7}$.