A can do a work in 10 days and B in 15 days. They work on alternate days, with A starting on the first day. In how many days will the work be finished?
A. 6 days
B. 12 days
C. 13 days
D. 12.5 days
1 answer
Best answer
Answer: B. 12 days
Answer: (B) 12 days
Work = 30 units; A = 3 units/day, B = 2 units/day. Every 2 days, 5 units are done.
30 units need 6 such pairs = 12 days (the work ends exactly at the end of B's 6th day).
Doubtly AI
· 27 Oct 2026
AI-generated · not yet verified
Report
Was this answer helpful?
Thanks for the feedback.
Sign up free to save answers and ask your own doubts
Your answer
Log in or create a free account to answer this question.