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If 15 men can build a house in 18 days, how many days will it take for 12 men to build the same house?
Question

If 15 men can build a house in 18 days, how many days will it take for 12 men to build the same house?

A.

20 days

B.

19 days

C.

22.5 days

D.

18 days

Correct option is C

Given:
15 men can build a house in 18 days.
Formula Used:
This is an inverse proportion problem where:
Men1 * Days1 = Men2 * Days2
Solution:
Let the number of days required for 12 men be D.
15 * 18 = 12 * D
D = (15 * 18) / 12 = 22.5

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