A Jar contains a mixture of AB in the ratio 4:1. When 40 L of Mixture is replaced with liquid B, ratio becomes 2:3. How many liters of liquid A was present in mixture initially. Select.
A) 12
B) 15
C) 16
D) 64
E) 25
40 litres of mixture that is replaced will contain 32 litres of A and 8 litres of B (as A:B = 4:1)   Let the initial volume of the mixture be 4K + 1K = 5K   So by condition ,   [ 4K-32 ]/ [ K-8+40 ]   4  + 1= 
<gadget id="calculator">  4  + 1</gadget>
<output>5</output>
5K   So by condition ,   [ 4K-32 ]/ [ K-8+40 ]= 2/3 =&gt; 12K -96= 2K-16+80 =&gt; 10K = 160   Solve for K which is K = 16   So initial volume of liquid A = 4K = 64 litres   Answer : 64
<result>D</result>
A Jar contains a mixture of AB in the ratio 4:1. When 40 L of Mixture is replaced with liquid B, ratio becomes 2:3. How many liters of liquid A was present in mixture initially.