Question

A 6-ft adult has a shadow 3.6 ft long. How long is the shadow of a 5-ft child standing next to the adult?

A. 3 ftB 2.6 ftC. 4 ft D> 3.6 ft

Answer 1

The adult's shadow forms a right triangle with the light source making an angle
`\theta` with the ground such that


`\tan\theta=\frac6{3.6}=\frac53`

which means the child's shadow is 3 ft long.