A takes 40 minutes to do a job . B Tajes 1 hour to do same job . A, B and C start doing that job togather. they complete it in only 15 minutes. Had C been alone how much time would he have taken to do that job

A takes 40 minutes to do a job . B Tajes 1 hour to do same job . A, B

1.	A takes 40 minutes to do a job . B Tajes 1 hour to do same job . A, B and C start doing that job togather. they complete it in only 15 minutes. Had C been alone how much time would he have taken to do that job
Answer» Let 1/A = 1/40 and 1/B = 1/60 and 1/A + 1/B + 1/C = 1/15 ADD equation 1 and 2 1/A + 1/B = 5 / 120 = 1 /24 SUBTRACT it from equation 3 1/C = 1/24 - 1 /15 = 1 / 40 C = 40 minutes

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A takes 40 minutes to do a job . B Tajes 1 hour to do same job . A, B and C start doing that job togather. they complete it in only 15 minutes. Had C been alone how much time would he have taken to do that job​

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A takes 40 minutes to do a job . B Tajes 1 hour to do same job . A, B and C start doing that job togather. they complete it in only 15 minutes. Had C been alone how much time would he have taken to do that job