All you did was convert 80 g to kg. But 0.08 kg of fertilizer is supposed to be used for1square meter. But the paddock is not 1 square meter, is it? How do we find out the area of this paddock?

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- Aug 11th 2010, 09:41 PM #1

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## ferterliser in paddock problem

A farmer needs to spread fertiliser over a paddock measuring 40 m by 80 m. The instructions on the fertiliser bag say to use 80 grams per square metre. How many kilograms of fertiliser will be needed?

I did 80 divied by 1000 = 0.08 kg is that right?

- Aug 11th 2010, 10:09 PM #2

- Aug 11th 2010, 10:17 PM #3

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- Aug 11th 2010, 10:32 PM #4
No, that's not right. You got the area, . Why on earth would you try to convert to kg by dividing by 1000? Can't do that, my friend.

We have a proportion here. If 0.08 kg is used for , how many kilograms is used for ? You could set up the proportion like this:

... and solve for x.

- Aug 11th 2010, 10:32 PM #5

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- Aug 11th 2010, 10:34 PM #6