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A Can Complete a work in 12 days and B Can Complete in 8 days. A works for 8 hrs every day while works for 10 hours every day. If A and B together start wooking & his Perday, in how many days will they complete the work?​

 Feb 13, 2020

Best Answer 

 #1
avatar+22108 
+2

A rate     1 job / (8hr/d x12 d)   =    1j / 96 hr

Brate      1 job/ (10hr/d x 8d)    =    1j /80 hr

 

1 job  /  ( 1 j / 96 hr   + 1 j / 80 hr) = 43 .63 hrs  

 

Together , they complete  8 hr + 10 hr   = 18 hr /day

 

43.63 hr / 18 hr/day =  2. 42 days

 Feb 13, 2020
 #1
avatar+22108 
+2
Best Answer

A rate     1 job / (8hr/d x12 d)   =    1j / 96 hr

Brate      1 job/ (10hr/d x 8d)    =    1j /80 hr

 

1 job  /  ( 1 j / 96 hr   + 1 j / 80 hr) = 43 .63 hrs  

 

Together , they complete  8 hr + 10 hr   = 18 hr /day

 

43.63 hr / 18 hr/day =  2. 42 days

ElectricPavlov Feb 13, 2020

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