The Recommended Safety Angle of a Ladder Against a Building $1 \overline { 0 }$

question 130

Multiple Choice

The recommended safety angle of a ladder against a building is 71 ^o. A $1 \overline { 0 }$ -m ladder will be used. How high up on the side of the building will the ladder safely reach? (See the illustration.) Round your answer to the appropriate number of significant digits.

• A) 11 m
• B) 9.5 m
• C) 8.9 m
• D) 7.8 m
• E) 8.4 m

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