A man wants to distinguish between two pillars located at a distance of `11 km`. What should be the minimum distance between the pillars ?

Options

A. 1.6 m
B. 3.2 m
C. 0.8 mm
D. 5 m

Answer

B

Explanation

`d theta=1'=((1)/(60))^(@)=(pi)/(180xx60)` radian
if d is the atual distance between the pillars, then
`d/D=d theta`
`therefore d =Dxxd theta=11000xx(pi)/(180xx60) underset(.)overset(.)(=)3.2m`