WAEC - Mathematics (1989 - No. 42)
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
13.9m
Giải thích
h =
40tan 69.7
= 402.703
h = 14.79 = 14.8