Question

45 labour can build a road in 20 days. how many labour will built the road in 60 days?

Answer 1

In this we apply indirect proportion
45 multiply 20 divided by 60
16 labour

Answer 2

number of labour = 45
days of working = 20
45 labour took 20 days
1 labour =
$\frac{20}{45} \\for \: 60 \: days$