Math, asked by mukeshkumar71, 1 year ago

6 man can complete the electric fitting in a building in 7 days. How many days will it taken 21men to do the job?

Answers

Answered by lasya61

here is ur answer...

Attachments:

amitnrw: And 21*2 = 42 again

afruja70: you are wrong bro

lasya61: yes.....

afruja70: 6 man take 7 days. .so 7 divided by 6. ..

lasya61: yes

amitnrw: Think simply if a work is done by more people then time will reduce or increase

afruja70: reduce

lasya61: but solution is this

amitnrw: Then men increased from 6 to 21 so days will reduce from 7 days or not

amitnrw: Number of man working and time taken for work are not directly proportional but inversally proportional.

Answered by afruja70

Hello mate

here your answer

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Prefer the attachment.

Hence
$24 \frac{1}{2} \: days \: are \: taken \: by \: 21 \: men \: to \: do \: the \: job$

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Thanks

Attachments:

amitnrw: x1/y1 = x2/y2 is directly proportional. inversaly proportional will be x1/x2 = y2/y1. or. x1/y1 = y2/x2

amitnrw: you have mentioned y1 below 21 so x1 = 21 , please evaluate fromula again

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