Question

what is the height of the post​

Answer 1

Answer:

Let AB be the vertical post its shadow is 21m when the altitude of the sun is 30

o

BC=21m,∠ACB=30

o

,AB=h metres (figure)

ABC is rt. △,

BC

AB

=tan30

o

⇒

21

h

=

3

1

⇒ h=

3

21

=

3

7×

3

×

3

=7

3

m

⇒ AB=h, Height of the pole =7

3

m

Explanation:

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