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shannenn
Dec 12, 2010, 06:27 AM
4 kitchen assistants can prepare 10 kg of vegatables in 45 minutes. How long would it take 15 assistants to prepare the same amount?

Unknown008
Dec 12, 2010, 10:05 AM
Seeing it at first, you might think about using simple proportions, but logic tells you that they should complete it in a lower period.

This is a problem which requires inverse proportions.

It is mainly in the form y = k\(\frac1x\)

where y is the time and x is the number of assistants.

Using the first piece of information, you can obtain the value of the constant k.

Then, you use that constant k with the new asked number of assistants and solve for x, the time that they take. What do you get? :)