The angle of depression of a point on the ground from the top of a…

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Mathematics WAEC 1989

The angle of depression of a point on the ground from the top of a building is 20.3o. If the foot of the building is 40m, calculate the height of the building, correct to one decimal place

  • 37.5m
  • 28.1m
  • 27.8m
  • 14.8m checkmark
  • 13.9m

The correct answer is: D

Explanation

Tan 69.7 = 40/h
h =
40/tan 69.7
=
40/2.703
h = 14.79 = 14.8
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