Question

It takes 8 days for 35 laborers to harvest coffee on a plantation. How long will 20 laborers take to harvest coffee on the same plantation.

Answer 1

Suppose 20 labourers need x days to harvest coffee.
If more labourers will help to harvest, then fewer days will be required.
That is, the number of labourers and number of days are in inverse proportion.
$\therefore 8\times 35=x\times 20$
$x=\frac{8\times 35}{20}$
$x=14$
$\therefore 14$ days are required by 20 labourers to harvest coffee.