Question

12 persons take 9 days to prepare 18 windows.The no of days required by 54 persons to prepare 45 windows.

Answer 1

It is given that , 12 persons take 9 days to prepare 18 windows.

12 Persons →9 Days →18 windows

As number of persons increases number of Days Decreases or vice versa.

Let, number of days required by 54 persons to prepare 45 windows= x days

So, Expressing the following in terms of proportionality and equating:

→ $\frac{12 \times 18}{9}=\frac{54 \times x}{45}\\\\ 24 = \frac{6 x}{5}\\\\ 6 x= 120 \\\\ x=20$→→→Dividing both sides by 6

So, number of days required by 54 persons to prepare 45 windows= 20 days