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A ladder makes an angle of 60° with the ground and its bottom is 3.7 m away from the wall. Find its length.
Question

A ladder makes an angle of 60° with the ground and its bottom is 3.7 m away from the wall. Find its length.

A.

7.4 m

B.

4.8 m

C.

3.7 m

D.

6.5 m

Correct option is A

Given:

Base distance = 3.7 m

Angle = 60°

Formula:

cos 60° = base ÷ length of ladder

Solution:

cos 60° = 1/2

1/2 = 3.7 / L

L = 3.7 × 2 = 7.4 m

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