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WAEC - Mathematics (1997 - No. 36)

The angle of elevation of a point T on a tower from a point U on the horizontal ground is 30o. If TU = 54m, how high is T above the horizontal ground?
108m
72m
46.3m
31.2m
27m

解释

sin30 = x/54
x =54 x 1/2
= 27m

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