At a point the angle of elevation ofvthe pole is such that it's tangent is5/2.On moving 240m towords the pole, the tangent to the angle of elevation becomes 3/4. Find the height of the pole.

-7

Soni Kumari answered this

for the same angle of incidence of 45 degree, the refraction angle in three transparent media a,b,c are 25 degree,30 degree,35 degree respactively . in which medium is the speedof light minimum and in which medium maximum???