40 mechanics can repair a bike in 56 days. In how many days 32 mechanics will do the same work?
We know that $$M_1 \times D_1 = M_2 \times D_2$$ where M = Number of men and D = Number of days.
$$40 \times 56 = 32 \times D_2$$
=> $$D_2 = 70$$
Hence, 32 mechanics can repair a bike in 70 days.
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