New RBI Grade B 2024 Batch 7 45+ 20 Days Study Plan; Download Now !!!
Register

Question

A and B together can do a work in 8 days. If A can alone do the same work in 24 days, then in how many days B alone will do the same work?

A 10 days Correct Answer Incorrect Answer
B 14 days Correct Answer Incorrect Answer
C 12 days Correct Answer Incorrect Answer
D 18 days Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

Total work = Number of days×1 day’s work (efficiency) Total work = LCM (8, 24) = 24 unit 1 day’s work of (A+B) = 24/8 = 3 unit 1 day’s work of A = 24/24 = 1 unit 1 day’s work of B = 3 - 1 = 2 unit Now, Time taken by B to completed the work = 24/2 = 12 days

Practice Next

Relevant for Exams:

×
×