Question

From the top of a vertical mast 140m high,two lorries on the same ground level are observed, one due east and the other due west of the mast.If their angles of depression are 65 and 38 respectively; calculate the distance between the two lorries
tan 65 = 140/d1
tan 38 = 140/d2

total distance = d1 + d2
what is the answer

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