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Answer variants:
1.155
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3.155
A ramp for unloading a moving truck has an angle of elevation of 60^{\circ}. If the top of the ramp is 1 m above the ground level, then the length of the ramp is
 m.
 
(Note: Use \sqrt{2} = 1.414 and \sqrt{3} = 1.732 if necessary.)
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