41.
|
P can complete a work in 12 days working 8 hours a day. Q can complete the same work in 8 days working 10 hours a day. If both P and Q work together, working 8 hours a day, in how many days can they complete the work?
|
|
|
Answer: Option A
Explanation:
P can complete the work in (12 x 8) hrs. = 96 hrs.
Q can complete the work in (8 x 10) hrs. = 80 hrs.
P's1 hour's work =
|
1
|
and Q's 1 hour's work =
|
1
|
.
|
96
|
80
|
(P + Q)'s 1 hour's work =
|
|
1
|
+
|
1
|
|
=
|
11
|
.
|
96
|
80
|
480
|
So, both P and Q will finish the work in
|
|
480
|
|
hrs.
|
11
|
Number of days of 8 hours each =
|
|
480
|
x
|
1
|
|
=
|
60
|
days = 5
|
5
|
days.
|
11
|
8
|
11
|
11
|
