Question

20 men can build a wall in nine days, then how long would it take 12 men to build
the same wall?​

Answer 1

IN 5/3 DAYS ......................

Answer 2

$\mathfrak{\huge{\green{\underline{\underline{Answer :}}}}}$

no. of men(x) 20 12

no. of days(y) 9 a

As the number of men increase the number of days decrease , hence it is indirectly inverse.

So, here x *y is the constant

So the equation will be like

20*9= 12*a

$\frac{20 \times 9}{12}$=a

$\frac{5 \times 9}{3}$=a

5 × 3 = a

15 = a

So, it takes 15 days for 12 men to build a wall.

$<marquee>$Hope It Will Help.❤