SSC NTA Delhi University Non-Teaching 2021 Mock Test Quantitative Aptitude Time and Work Work Efficiency
P, Q and R take 18, 15 and 10 days respectively to complete a job. Compare their efficiencies as a ratio.
1
5 : 6 : 9
2
5 : 5 : 9
3
5 : 6 : 4
4
5 : 6 : 10