Question

It take 4 people 40 minutes to clean a garden. How long will it take 6 people to clean the same garden

Answer 1

4/9 of an hour (26.666 minutes)

Explanation:

4 * x * 40/60 = 1

x * 160/60 = 1

x=60/160 = 6/16 = 3/8 (this is the rate for one worker)

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6 * (3/8) * x = 1

x = 4/9