Question

15 masons can build the wall in 20 days. How many masons will build the wall in 12 days?

Answer 1

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Let Mason that work in 12 days be x

Mason : Days

15 : 20

x : 12

(Indirect proportion)

15 X 20 = 12x

$x = \frac{15 \times 20}{12}$

x= 25

Therefore, 25 masons are required to built the wall in 12 days.