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From a window 9 m above the ground in a Surat apartment, the angle of depression of the top of a parked delivery van is 60°.
The top of the van is 3 m above the ground.
Find the exact horizontal distance (in m) of the van from the wall of the building.

Class 10Heights and DistancesTrigonometry
  • A
  • B
  • C
  • D6

Step-by-Step Solution

The vertical drop from the window down to the top of the van is 9 - 3 = 6 m. tan m (about 3.46 m). Using the full 9 m forgets that the top of the van is already 3 m above the ground.
Answer: B)

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