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If 12 carpenters working 6 hours a day can make 460 chairs in 240 days, then number of chairs made by 18 carpenters in 360 days each working 8 hours a day ?

If 12 carpenters working 6 hours a day can make 460 chairs in 240 days, then number of chairs made by 18 carpenters in 360 days each working 8 hours a day ? Correct Answer 1380

$${\text{According to the question,}}$$
$$ \Rightarrow \frac{{12 \times 6 \times 240}}{{460}}$$     = $$\frac{{18 \times 360 \times 8}}{x}$$
$$\eqalign{ & \Rightarrow x = \frac{{18 \times 360 \times 8 \times 460}}{{12 \times 6 \times 240}} \cr & \Rightarrow x = 1380 \cr} $$

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