state gov Rajasthan Gram Vikas Adhikari (VDO) Mock Test 2021 Quantitative Aptitude Time and Work Work Efficiency
A can do a piece of work in 20 days and B can do the same piece of work in 30 days. Find in how many days both can do the work.
1
12 days
2
15 days
3
13 days
4
8 days