A ladder of a fire truck is elevated to an angle of 60° and extended to a length of 70 feet. If the base of the ladder is 7 feet above the ground, how many feet above the ground does the ladder reach?
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A35
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B42
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C$${35}\sqrt{3}$$
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D$$7+{35}\sqrt{3}$$
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E$$7+{42}\sqrt{3}$$