The mean weight of 34student of school is 42kg.if the weight of teacher is included,then the mean rises by 400g.find the weight of the teacher.
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weight of student is 34*42kg = 1428kg
weight of included teacher is 34*42.4kg = 1441.6kg
extra weight is 1441.6-1428 = 13.6kg
weight of included teacher is 34*42.4kg = 1441.6kg
extra weight is 1441.6-1428 = 13.6kg
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