AFCAT I 2018 Solved Paper

According to question,
If P can complete a work in 1 day, Q can complete the same work in 4 days.
Hence, if the difference is 3 days, Q can complete the work in 4 days
⇒ If the difference is 45 days, Q can complete the work in60 days
∴ Q's 1 day's work =

1

60

∴ P's 1 day's work = 4 ×

1

60

=

1

15

∴ (P + Q)'s 1 day's work
= (

1

15

+

1

60

) =

(4+1)

60

=

5

60

=

1

12

∴ P and Q together can do work in 12 days.