alleryTwelve men could complete a job in 20 days. After 5 days, 6 men leave. The remaining work takes
A40 days
B25 days
C30 days
D20 days
Answer & Solution
Correct answer: C. 30 days
Work left is 12 x 15 = 180 man-days, and 6 men need 180/6 = 30 days.
Keep practising Time and Work
Browse all Time and Work questions for RRB NTPC, or explore more Quantitative Aptitude topics.
Related questions
What labor metric denotes the amount of work done by an average worker in a day?How is task time found from man-hours and worker count?If a task requires 20 man-hours, how many hours will a team of 2 workers take?A takes 12 days and B takes 24 days. A leaves 3 days before the work ends. Total time wasA does a job in 16 days, B in 8 days. A works 4 days alone, then B joins. Total time from A alone does a job in 9 days and B alone in 18 days. They earn Rs 900 together. A's share Sita does a job in 30 days. Sita and Tara together do it in 20 days. Tara alone needsA pipe alone fills a tank in 15 minutes; with a second pipe it takes 6 minutes. The second