A can do a piece of work in 10 days and B in 20 days. They begin together but A leaves 2 days before the completion of the work. The whole work will be done in.
A8 days
B7 2/3 days
C7 days
D6 days
Answer:
A. 8 days
Explanation:
Let the required days be x
A work for (x-2) days, while 'B' work for 'x' days According to the question,
(x - 2)/10 + x/20 = 1
2x - 4 +x = 20
3x =24
x = 8 days