From the top of a pole house A in a street, the angles of elevation and depression of the top and foot of house B on the opposite side of the street are 60°…
From the top of a pole house A in a street, the angles of elevation and depression of the top and foot of house B on the opposite side of the street are 60° and 30°, respectively. If the height of pole house A is 21 m, then what is the height (in m) of house B? (correct to one decimal place)
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Correct answer: (A) 48.5