A and b can comolete a work alone in 18 days and 24 days respectively . if b started wirk alone and after 3 days a also joined then in how many days whole work will ne completed
Answers
Answered by
1
Person A can complete the work in 18 days
⇒ 1 day = 1/18 of the work
Person B can complete the work in 24 days
⇒ 1 day = 1/24 of the work
Person B worked alone for 3 days
⇒ Work completed = 1/24 x 3 = 3/24 = 1/8
Work left to do = 1 - 1/8 = 7/8
Person A and Person B worked together:
1 day = 1/18 + 1/24 = 7/72
Number of days needed = 7/8 ÷ 7/72 = 9 days
Total number of days needed = 3 + 9 = 12 days.
Answer: 12 days
Similar questions