Mathematics, 11.07.2019 18:30, tadediwura

It takes a boy 30 minutes to mow the lawn, but his sister can mow it in 45 minutes. how long would it take them to mow the lawn if they worked together, using two lawn mowers?

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It takes a boy 30 minutes to mow the lawn, but his sister can mow it in 45 minutes. how long would i...

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