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A ladder 20m long is leaning against a v...

A ladder 20m long is leaning against a vertical wall. It makes an angle of `30^@` with the ground. How high on the wall does the ladder reach?
(a)10m
(b)17.32m
(c)34.64m
(d)30m

A

10 m

B

17.32 m

C

34.64 m

D

30 m

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