A solution of 70 litres contains oil and water in the ratio 9:x. If six litres of water is added to the solution, the ratio becomes 6:4, find the value of x?  Choices:
A) 6
B) 8.5
C) 9
D) 6.5
E) 5
Exp. Total new quantity = original sol + water =70+6= 
<gadget id="calculator">70+6</gadget>
<output>76</output>
76   New ratio= 6:4, New quantity of oil =6/10*76= 
<gadget id="calculator">6/10*76</gadget>
<output>228/5 = around 45.6</output>
45.6 Lit,   New quantity of water= 4/10*76= 
<gadget id="calculator">4/10*76</gadget>
<output>152/5 = around 30.4</output>
30.4 Lit   Water present initially= (30.4-6)= 
<gadget id="calculator">(30.4-6)</gadget>
<output>24.4</output>
24.4 Lit   Ratio= 45.6/24.4 =9/x There for x = 4.81 approx 5   Answer: 5
<result>E</result>
A solution of 70 litres contains oil and water in the ratio 9:x. If six litres of water is added to the solution, the ratio becomes 6:4, find the value of x?