arithmetic - in a garments factory 5 men can complete a work in 14 days and 7 children take 20 days to complete the work how many days will 7 men and 14 children take to complete the work - skillgun

Solution: 1 man's 1 day's work = 1/(5 * 14) = 1/70.; 1 child's 1 day's work = (1/(7*20)) = 1/140.
(7 men + 14 children)'s 1 day's work = (7/70 + 14/140) = (1/10 + 1/10) = 2/10 = 1/5.
.'. 7 men and 14 children will complete the work in 5 days.