P works twice as fast as Q. If Q alone can complete a work in 12 days, P and Q can finish the work in --- days Choose the correct choice:
A) 1
B) 2
C) 3
D) 4
E) 5
Explanation :   Work done by Q in 1 day = 1/12   Work done by P in 1 day = 2 × (1/12) = 1/6   Work done by P and Q in 1 day = 1/12 + 1/6 = ¼   =&gt; P and Q can finish the work in 4 days   Answer : Option 4
<result>D</result>
P works twice as fast as Q. If Q alone can complete a work in 12 days, P and Q can finish the work in --- days