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A ladder 15 m long just …

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A ladder 15 m long just reaches the top of a vertical wall. If the ladder makes an angle of 60° with the wall. Find the height of wall.

Posted by Nikita Sharma 6 years, 11 months ago

CBSE > Class 10 > Mathematics

3 answers

Yogita Ingle 6 years, 11 months ago

Let AB be the wall and AC be the ladder

We have,
AC = 15 m and ∠BAC = 60°
Cos 60° = AB/AC
⇒ 1/2 = AB/15
⇒ AB = 15/2 m

4Thank You

. . 6 years, 11 months ago

Take ladder as the hypotenuse and height of as the perpendicular and dist. bet . base of wall and ladder as the base then apply tan 60

2Thank You

Nikita Sharma 6 years, 11 months ago

I have a confusion in figure

1Thank You

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CBSE > Class 10 > Mathematics