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in the above triangle ABC AB = 4m and AC (shadow) = 20 m
similarly in triangle PQR PQ (tower ) and QR = 120 its Shadow
since both the triangles are similar therefore ratio of their corresponding sides will be same ; as follows
PQ/QR = AB/AC
now we can substitute values as follows
PQ/120 = 4/20
solving we get PQ = 120/5 = 24 m (Answer)
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