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Q:

The shadow of a tower standing on a level plane is found to be 30 metre longer when the Sun's altitude changes from 60 ° to 45 °. The height of the tower is 

  • 1
    15 (√3-1) m
  • 2
    15 (3-√3) m
  • 3
    15 (3+√3) m
  • 4
    15 (3-√3) m
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Answer : 3. "15 (3+√3) m "

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