Question

two person A and B are engaged in a work A can do a piece of work in 12 days and B can do the same work in 20 days they work together for 3 days and then A goes away. In how many days will B finish the work​

Answer 1

Answer:

Solution

Work done by A in 1 day = 12

Work done by B in 1 day = 20

Work done by A and B together in 1 day = 12

+

20

1

=

60

5+3

=

60

8

=

15

2

Work done by A and B together in 3 days =

15

2

×3=

5

2

Remaining Work =1−

5

2

=

5

3

Number of days taken by B to finish the remaining work =

20

1

5

3

=

5

3

×

1

20

=12 days.