Question

A does half as much work as B in three-fourth of the time if together they take 18 days to complete a work .how much time shall B take to do it?

Answer 1

Let B takes x days to do the work.

According to the question

A takes 2×

4

3x

​

=

2

3x

​

(A+B)s 1 days work=

18

1

​

then

x

1

​

+

3x

2

​

=

18

1

​

3x

5

​

=

18

1

​

x=

3

18×5

​

=30

Hence B takes 30 days to do work