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IBPS RRB Officer Prelims 14 Nov 2016 Shift 3 Paper
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© examsnet.com
Question : 55
Total: 80
Jar A has 60 litres of mixture of milk and water in the respective ratio of 2 : 1. Jar B which had 40 litres of mixture of milk and water was emptied into jar A, as a result in jar A, the respective ratio of milk and water became 13 : 7. What was the quantity of water in jar B?
8 litres
15 litres
22 litres
7 litres
1 litre
Validate
Solution:
(2) In jar A ,
Quantity of milk
=
2
3
×
60
=
40
litres
Quantity of water = 20 litres
Let the quantity of water in jar B be x litres.
∴ Quantity of milk
= (40 – x) litres
According to the question,
40
+
40
−
x
20
+
x
=
13
7
⇒
80
−
x
20
+
x
=
13
7
⇒
260
+
13
x
=
560
–
7
x
⇒
13
x
+
7
x
=
560
–
260
⇒ 20x = 300
⇒
x
=
300
20
=
15
litres
© examsnet.com
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