Question

3. Only one correct answer should be marked
4. All the question carry two marks each
1. A alone can do a piece of work in 10 days and B alone can do it in 15 days. In how
many days will A and B together do the same work?
(a) 5
б) 6
(c) 8
(d) 9
2. Jack can finish a work in 10 days and Tom can do the same work in half the time
taken by A. Then, working together, what part of the same work they can finish in a day?
(a) 3/10
(b) 1/9
(c) 2/5
(d) 2/7
3. A man can do a piece of work in 5 days, but with the help of his son, he can dolt in 3
days. In what time can the son do it alone?
(a) 6/2 days
(b) 7 days
(c) 7'/2 days
(d) 8 days
4. White can do a job in 15 days and Lee can do the same job in 9 days. With the help
of Scott, they did the job in 3 days only. Then, Scott alone can do the job in
(b) 62/6 days
(a) 61/6 days
(d) 10 days
(c) 68/7 days​

Answer 1

Answer:

1. b

2.a

3.c

4.a

Step-by-step explanation:

it is perfect answer