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Re: If it takes three days for 10 workers to finish building one house, ho [#permalink]
Lobna12 wrote:
I reached a different solution.

If one house takes 3 workers to finish in 10 days. Then 1 worker would finish the same job in 30 days.

Then for one worker to complete four houses he needs 30*4=120 days. Then 15 workers can do it in 120/15=8 days. Ans C

Yes I made an error, calculating rate per worker..

Posted from my mobile device
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Re: If it takes three days for 10 workers to finish building one house, ho [#permalink]
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: If it takes three days for 10 workers to finish building one house, ho [#permalink]
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