Working together at their constant rates , A and B can fill an empty tank to capacity in1/2 hr.what is the constant rate of pump B?
1) A's constant rate is 25LTS / min
2) the tanks capacity is 1200 lts.









From the original statement we know that:
1/A + 1/B = 1/(1/2)
From Statement 1 we can plug in and find B: SUFFICIENT
Statement 2 is completely unnecessary:
ANSWER: A. Statement 1 alone is sufficient