Question

32 ques
ASAP
Ans given is (2)

32. ​Two parallel pillars are at distance of 11 km from a person. Find the minimum distance between these pillars at which the person is able to see them distinctly :-

(1) 3.2 m (2) 6.4 m (3) 9.2 m (4) 7.2 m

Answer 1

Dear Student,

$$\begin{gathered} \mathrm{Resolving}\mathrm{power}\mathrm{of}\mathrm{eye}={\left(\frac{1}{60}\right)}^0 \\ \mathrm{Resolving}\mathrm{power}\mathrm{of}\mathrm{eye}=\frac{\mathrm{\pi }}{180\times 60}\mathrm{rad} \\ \mathrm{Let}\mathrm{d}\mathrm{be}\mathrm{the}\mathrm{required}\mathrm{distance}, \\ \frac{\mathrm{\pi }}{180\times 60}=\frac{\mathrm{d}}{11000} \\ \mathrm{d}=\frac{\mathrm{\pi }\times 11000}{180\times 60}=3.2\mathrm{m} \end{gathered}$$

Regards