1.

10 men working 6 hours a day can complete a work in 18 days

Answer»

6

Step-by-step EXPLANATION:

More Men, Less Hours {Indirect Proportion}

Less DAYS, More Hours {Indirect Proportion}

\begin{aligned}

\begin{bmatrix}Men & 15 & 10 \\Days & 12 & 18 \END{bmatrix} :: 6 : x \\

=> x * 15 * 12 = 10 * 18 * 6 \\

=> x = \frac{10*18*6}{15*12} \\

=> x = 6



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