SOLUTION: It takes a boy 45 minutes to mow the lawn, but his sister can mow it in 90 minutes. How long would it take them to mow the lawn if they worked together, using two lawn mowers?
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Question 759073: It takes a boy 45 minutes to mow the lawn, but his sister can mow it in 90 minutes. How long would it take them to mow the lawn if they worked together, using two lawn mowers?
___ min Answer by jim_thompson5910(35256) (Show Source):
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