Question

it takes 120 minutes to weed a garden with 6 gardeners if the same work is to be done in 30 minutes, how many more gardeners are needs?
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Answer 1

Answer:

18 more gardeners are needed

Step-by-step explanation:

6 gardeners weed the garden in 120 minutes

Therefore, 1 gardener will weed the garden = 120 × 6 = 720 minutes

In 1 minute 1 gardener will do = 1/720 work

In 30 minutes 1 gardener will do = 30 × (1/720) work = 1/24 work

Let the number of gardeners required are n

In 30 minutes n gardeners will do = n/24 work

According to the question

n/24 = 1

or, n = 24

More gardners needed = 24 - 6 = 18

Therefore, 18 more gardeners are needed.

Hope this is helpful.