Multiple choice

Passage

Directions: In the following problem, you have to find out which of the given statements is/are necessary for determining the answer of the question asked.

What is the average speed of the car over the entire distance? I. The car covers the whole distance in four equal stretches at the speeds of 10 kmph, 20 kmph, 30 kmph and 60 kmph, respectively. II. The total time taken is 36 minutes.

  1. Only I

  2. Either I or II

  3. Neither I nor II

  4. Only II

  5. Both I and II
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Average speed = Total Distance / Total Time. Statement I provides speeds for four equal distances, allowing calculation of average speed regardless of total distance. Statement II provides total time, but without distance, it is insufficient. Thus, only I is necessary.

AI explanation

Statement I gives the speeds for four equal stretches of the total distance, meaning we can assume any total distance (like 120 km) and calculate the time for each stretch. The times would be 3, 2, 1, and 0.5 hours, allowing us to calculate the average speed using the formula total distance divided by total time. Statement II only provides the total time, which is insufficient because it lacks the actual distance. Therefore, only statement I is necessary to determine the answer.

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