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# 15 workers can paint 3 fences in 2 hours. Assuming each work

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Senior Manager
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15 workers can paint 3 fences in 2 hours. Assuming each work [#permalink]  02 Oct 2017, 22:30
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Question Stats:

0% (00:00) correct 100% (01:00) wrong based on 1 sessions
15 workers can paint 3 fences in 2 hours. Assuming each worker works at the same rate, how long will 5 workers take to paint 6 fences?

(A) 3 hrs

(B) 6 hrs

(C) 7.5 hrs

(D) 9 hrs

(E) 12 hrs

Kudos for correct solution.
[Reveal] Spoiler: OA
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Re: 15 workers can paint 3 fences in 2 hours. Assuming each work [#permalink]  03 Oct 2017, 04:43
Using the formula $$items = workers*time*rate$$, we get that the rate is $$3 = 15*2*x$$, x = 3/30 = 1/10.

Then, if we change number of fences and workers, we get $$6 = 5*x*\frac{1}{10}$$, x = 12 hours.

Re: 15 workers can paint 3 fences in 2 hours. Assuming each work   [#permalink] 03 Oct 2017, 04:43
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