if 16 men working 7 hours a day can plough field in..., Chain Rule, General Mathematics

Question:If `16` men working `7` hours a day can plough a field in `48` days, in how many days will `14` men working `12` hours a day plough the same field ?

A `46` 
B `35` 
C `32` 
D `30`

/17

+ AnswerC

+ ExplanationLess men, more days  (Indirect)

More hrs/day, less days (Indirect)

men               `{:(14 : 16
text(Hrs/Day,)),(12 : 7 )} :: 48 : x`

`:. 14 xx 12 xx x = 16 xx 7 xx 48` or

`x = ((16 xx 7 xx 48)/(14 xx 12))`

`= 32`.

`:.` Required number of days 

`= 32`.

+ Report

Descriptive on Chain Rule Ebook

Total Preview: 1174