Multiple choice

Passage

Each of the following questions below consists of a question and two statements numbered I and II given. You have to decide whether the data provided in the statements is sufficient to answer the question.

What is the speed of boat in still water? I. Boat covers 15 km in upstream speed in 5 hours. II. Ratio of speed of downstream and upstream is 4: 3.

  1. statement, I alone is sufficient to Answer

  2. statement II alone is sufficient to Answer

  3. Either Statement I or Statement II is sufficient to answer the question

  4. neither statement I nor II is sufficient to answer the question.

  5. Both statements I and II together is necessary to answer the question.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Statement I: Upstream speed = 15/5 = 3 km/h = b - s. Statement II: Downstream/upstream = 4/3, so downstream speed = 4/3 × 3 = 4 km/h = b + s. From I and II together: b - s = 3, b + s = 4. Adding: 2b = 7, b = 3.5 km/h. Both statements necessary.

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