16-09-2016
Mathematics

contestada

A tv ad claims that 4 L of paint will cover 40m2. How much paint is needed to cover 70m2?

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AndrewZhang AndrewZhang

17-09-2016

7 L of paint is needed to cover 70m2. For 40m2, you can see that 4 L is needed, which means that for every 1 L, 10m2 can be covered. Multiply 1 L and 10m2 by 7, and you get 7 L is needed for 70m2.

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