Math, asked by ssumya36, 1 year ago

A contractor has a workforce of 420 men who can finish a certain piece of work in 9 months. How many extra men must he employ to complete the same job in 7 months. Answer me fast.

Answers

Answered by loptboy

420men finish work in =9 months
then let men be x for finishing work in 7 month
Then-
420. x
-------- = -------
9. 7
now do cross multiply then
420×7= x×9
420×7
---------= x
9
x=327(approx.)
hence, 327 worker needed to complete work in 7 month

ssumya36: wrong correct answer is 120

ssumya36: Answers are written in my book

ssumya36: and I saw correct answer is 120

angomranjanpawvhq: 120 is correct

angomranjanpawvhq: Let y be extra men, then (420+y) X 7= 420 X 9

angomranjanpawvhq: Or 420 +y=3780/7 or y=520-420 i.e. y=129

angomranjanpawvhq: Oops! i.e y=120 not 129

Answered by deviv8390

Step-by-step explanation:

i hope you understand ☺️☺️☺️☺️☺️☺️☺️..... follow me

Attachments:

Previous Question

Next Question