Question

if 8 men can dig a trench in 14 days,how long will 28 men take to dig a similar trench

Answer 1

8 men can dig = 14 days
1 man can dig in = 14×8 days
28 men can dig = (14×8 )/28=4 days.
Hope it was helpful. ☺

Answer 2

Let the number be x.

Then x = 8 * 14/28

            = 4.

28 men will take 4 days to dig a similar trench.