Question

18. A does half as much work as B in three-forth of the time. If together they take 18
days to complete the work, how much time shall B take to do it?
1) 40 days 2) 35 days 3) 25 days 4) 30 days 5) 40 days
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Answer 1

Answer:

If together they take 18 days to complete the work, how much time shall B take to do it alone? = (4+6)×18 = 180 units.

Answer 2

Answer:

ok

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Step-by-step explanation:

Let B takes x days to do the work.

According to the question

A takes 2× 3x/4

= 3x/2

(A+B)s 1 days work= 1/18

then

1/x + 2/3x = 1/18

5/3x = 1/18

x= 18×5/3

=30

Hence B takes 30 days to do work