Math help

bearing of a tower are taken from two points A and B 250m apart, along a straight line north-south path, A being due north of B.the bearing of the tower from A to B are 140* and 110* respectively.choose two option that gives a distance from A and B of the tower to nearest meter.
a)231 b)321 c)355 d)405 e)453 f)470 g)504 h)554

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