0 votes 0 votes Worker $A$ takes $8$ hours to do a job. Worker $B$ takes $10$ hours to do the same job. How long it take both $\text{A&B}$, working together but independently, to do the same job? $40/9$ days $40/7$ days $7.5$ days $8.5$ days Quantitative Aptitude nielit2016mar-scientistc work-time + – Lakshman Bhaiya asked Apr 2, 2020 • edited Oct 31, 2020 by soujanyareddy13 Lakshman Bhaiya 13.7k points 686 views answer comment Share See all 0 reply Please log in or register to add a comment.
0 votes 0 votes It should be 40/9 hrs not days abhishek tiwary answered Dec 11, 2020 abhishek tiwary 184 points comment Share See all 0 reply Please log in or register to add a comment.
0 votes 0 votes Answer is A A =$\frac{1}{8}$ $B=\frac{1}{10}$ We have to find A+B = $\frac{1}{8} +\frac{1}{10} = \frac{9}{40}$ Time taken for both A and B to do the same work is $\frac{40}{9}$ hours neethu_seb answered Dec 14, 2022 neethu_seb 3.4k points comment Share See all 0 reply Please log in or register to add a comment.