Question

a can do a piece of work in 14 days while B can do it in 21 days they begin together and worked at it for 6 days then a cell in and B had to complete the remaining work alone in how many days was the work completed ​

Answer 1

Answer:

Step-by-step explanation:

14,२1 lcm = 42

efficiency = 3,2

in 6 days both did = 5*6 = 30 unit

left to be done by B = 12 unit

B did rest work in = 12/2 = 6 days .

total work completed in = 6+6 = 12 days