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20 February, 02:38

Wilma can mow a lawn in 80 mintues. Melissa can mow the same lawn in 120 minutes. How long does it take for both Wilma and Melissa to mow the lawn if they working together?

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  1. 20 February, 05:11
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    There is a formula for that;

    Total time = (Worker 1 * Worker 2) / (Worker 1 + Worker 2)

    Total time = (80 * 120) / (80 + 120)

    Total time = 9,600 / 200

    Total time = 48 minutes
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