Each question given below is followed by three statements. Study the question and
the statements. Identify which option is necessary to answer the question.
A tank is fitted with two taps A and b: In how much time will the tank be full if both the taps are opened together?
I. A is 50% more efficient than B
II. A alone takes 16 hours to fill the tank
III. B alone takes 24 hours to fill the tank
Let total work to be done is 48 units
Case 1 : I and II
A takes 16 hours => B=24 hours (since A is 50 percent more efficient than B)
A does 3 units/hour
B does 2 units/hour
Total per day work = 5 units
Total time taken = 48/5 hr
Case 2 : I and III
B takes 24 hours => A = 16 hours (since A is 50 percent more efficient than B)
Together they take = 48/5 hours
Case 3 : II and III
B takes 24 hours
A takes 16 hours
Together they take = 48/5 hours
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