Question

1.
(a) 70 days
(c) 271 days
2.
A can do a piece of work in 30 days while B can do it in 40 days. In
how many days can A and B working together do it?
(b) 42 3 days
(d) 171 days
(R.R.B. Exam, 1989)
A and B can together do a piece of work in 15 days. B alone can do it
in 20 days. In how many days can A alone do it?
(a), 30 days
(b) 40 days
(c) 45 days
O (d) 60 days
(R.R.B. Exam, 1991
A and B can do a piece of work in 6 days and A alone can do it in
days. The time taken by B alone to do the work is :
(a) 18 days
(b) 15 days
71
3.
(c) 12 days
days​

Answer 1

Answer:

plz put a Soical science questions

Explanation: