Question

4 men can do a work in 7 hours. How many men are required to do the work in 2 hours

Answer 1

M * T / W = Constant
where, M= Men (no. of men)
T= Time taken
W= Work load
So, here we apply
M1 * T1/ W1 = M2 * T2 / W2
Given that, M1 = 4 men, T1 = 7 hours ; T2 = 2 hours, we have to find M2 =?
Note that here, W1 = W2 = 1 road, ie. equal work load.
Clearly, substituting in the above equation we get, M2 = 14 men.