Question

if two painters paint two rooms in two hours then how many painters would be required to paint 18 rooms in six hours? explain..how to use proportionality in this?

Answer 1

So if 2 painters paint 2 rooms in 2 hours, that means that 2 painters can paint 1 room per hour.
So if you want to paint 18 rooms in 6 hours, that means that you need to paint 3 rooms per hour.
Therefore, 2 painters do 1 per hour, so 2 times 3 must be needed to do 3 per hour.

Thus, the answer is 6 painters.