Question

a can do a piece of work in 14 days while B can do it in 21 days .They began together and worked for 7 days .Then , A fell ill and B had to complete the work. In How many days was the work completed​

Answer 1

Step-by-step explanation:

∴ they can work together in 42/5 days. ∴ Total time taken to complete the work =12days.