Two boys one 52 inches tall and the other 55 inches tall, are standing at distances 4.0 m and 5.0 m respectivley from an eye. Which boy will taller?

Answer

First boy

Explanation

Angle subtended by the first boy, on the eye
`alpha_2 = (52 "inch")/(4.0 m) = 13 inch//m`
Angle subtended by the second boyon the eye si
`alpha_2 = (55 "inch")/(5.0 m) = 11 inch//m`
As `alpha_1 gt alpha_2`, therefore the first boy will look taller to the eye.