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Q:

If the angle of elevation of the Sun changes from 30 ° to 45 °, the length of the shadow of a pillar decreases by 20 meters. The height of the pillar is 

  • 1
    10 ( √3-1 ) m
  • 2
    1 ( √3 + 1 ) m
  • 3
    20 ( √3-1) m
  • 4
    20 (√3 + 1) m
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Answer : 2. "1 ( √3 + 1 ) m"

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