Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Quantitative Aptitude Time and Work Work Efficiency
A and B can together complete a task in 20 hours. After 5 hours, A leaves then B takes 45 hours to finish the remaining task. How many hours would A have taken to complete the entire task, if he worked alone from the beginning?
1
30 hours
2
40 hours
3
48 hours
4
60 hours