Subject: General Aptitude · Chapter: Time and Work · Exam: 2004 · Marks: · Difficulty:
A can do a piece of work in 15 days, which B can do in 10 days. B worked at it for 8 days. A can finish the remaining work in
(a)2 days
(b)3 days
(c)5 days
(d)10 days
Answer
Answer (as printed): B
Explanation
B's 8 days' work $=\left(\frac{1}{10} \times 8\right)=\frac{4}{5}$. Remaining work $=\left(1-\frac{4}{5}\right)=\frac{1}{5}$. Now, $\frac{1}{15}$ work is done by A in 1 day. $\therefore \frac{1}{5}$ work is done by A in $\left(15 \times \frac{1}{5}\right)=3$ days.
Explanation as extracted from the printed page; notation may be imperfect.