Question

1. The ratio of the length of a vertical rod and the length
its shadow is 1 : 13. Find the angle of elevation of
the sunat
that moment?
2. Two cones have their heights in the ratio 1 : 3 and
radii in the ratio 3 : 1. What is the ratio of their
volumes ?
3. A letter of English alphabet is chosen at random.
What is the probability that the chosen letter is a
consonant.​

Answer 1

Answer:

Answer

Given :-

l(BC)

l(AB)

=

3

1

now, angle of elevation, ∠ACB=θ

now, tanθ=tan(∠ACB)=

BC

AB

=

3

1

⇒tan

θ=(

3

1

)

=tanθ=(tan

6

π

)