Question

hours.
EXERCISE 11 A
1. A can do a piece of work in 15 days while B can do it in 10 days. How long will they take together
to do it?
2. A, B and C can do a piece of work in 12 days, 15 days and 10 days respectively. In what time will
they all together finish it?
3. A and B together can do a piece of work in 35 days, while A alone can do it in 60 days. How long
would B alone take to do it?
4. A can do a piece of work in 20 days while B can do it in 15 days. With the help of C, they finish
the work in 5 days. In what time would C alone do it?
5. A can do a piece of work in 12 days and B alone can do it in 16 days. They worked together on it
for 3 days and then A left. How long did B take to finish the remaining work?
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Answer 1

Answer:

1A Number of days for completing work=3 days

2A they together can do it in 4 days

3A b can do it alone in 84 days

4A c alone can do it in 20 days

5A B wil take 9 days to complete the remaining work