*Let’ consider number of men required be ‘x’ men**
| Length of trench (m) | 27/4 | 27 |
| Number of men | 11 | x |
(27/4)/11 = 27/x
By cross-multiplying
x27/4 = 27(11)
x27/4 = 297
x = (297 × 4)/27
= 44
∴ To dig 27 m long trench of same type in one day requires 44 men.
