How Long will 28 men, Working 12 Hours a Day, Take to Complete the Work?

Answer: (3) 8 days

Explanation:-
Formula-
M₁D₁H₁ = M₂D₂H₂
Where, M = number of men, D = number of days and H = number hours.

Given,
M₁ = 16, D₁ = 12, H₁ = 14, M₂ = 28, H₂ = 12 and D₂ = ?

Then, 16 x 12 x 14 = 28 x 12 x D₂
D₂ = 16 x 12 x 14 /28 x 12
= 16/2
= 8 days
Then, 28 men working 12 hours a day, take to complete the work in 8 days.

Hence, the answer is (c) 8 days.