If 1/$$4^{th}$$ of the wall is painted blue, 1/2 is painted yellow and remaining 3 m is painted white, what is the length of the wall?
Let the length of the wall be x
According to the question,
$$x-\left(\frac{x}{4}+\frac{x}{2}\right)=3$$
$$x-\frac{6x}{8}=3$$
$$\frac{2x}{8}=3$$
x = 12
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