Question

A vertical post 9m high is broken at a certain height ,and its upper part not

completely separated ,meets the ground at an angle of 300

.Find the length of

the post.​

Answer 1

Answer:

Given that, AB=Post=15 feet,∠CDB=30

∘

and the post breaks at point C.

Let the height at which post is broken be x feet.

⇒AC=CD=(15−x)feet

From △BCD,

sin30

∘

=

CD

BC

⇒

2

1

=

15−x

x

⇒2x=15−x⇒3x=15⇒x=5 feet

Hence, the height at which the post is broken is 5 feet.

Step-by-step explanation:

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