Brightstorm Q & A : It takes Tim 4 mins to build a snowman and his younger brother Jim 12 mins to build a snowman. How long will it take them to build a snowman working together?

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answer #1

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lqez now

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T: rate= 1/4 time=x work done= 1 J: rate= 1/12 time=x work done=1 x/4 + x/12 = 1 (because you need to make ONE snowman) 4x/12 = 1 x=3 minutes

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Jiyoungy August 11, 2010

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actually, my above answer doesn't make sense.... i'm sorry i believe the answer should be between 4 and 12 minutes

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Jiyoungy August 11, 2010

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I also think it is 4-12 minutes.

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ChromeRedCat August 11, 2010

Flag this because it ...