Multiple choice

Directions: The following question is accompanied by statements A, B and C. You have to determine which of the statements is/are sufficient/necessary to answer the question. Anupam and Brewster are chasing each other. What is the distance between them after 9 minutes? A. Brewster is followed by Anupam at a distance of 1300 m. B. Anupam and Brewster start running at the rates of 13 km/hr and 19km/hr, respectively. C. The relative speed of Anupam and Brewster is 6 km/hr.

  1. C alone is sufficient.

  2. Only B and C are sufficient.

  3. A and C together are sufficient.

  4. All together are necessary.

  5. Either B or C is sufficient.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

To find the distance after 9 minutes, we need the initial distance (A) and the relative speed (C). Statement B is redundant if C is provided.

AI explanation

The question asks for the distance between Anupam and Brewster after 9 minutes, which requires knowing their initial separation and their relative speed. Statement A provides the initial distance of 1300 m, and statement C provides their relative speed of 6 km per hr, which is 100 m per min. By multiplying the relative speed of 100 m per min by 9 minutes, we find they cover a relative distance of 900 m, and adding this to the initial 1300 m gives the total distance; thus, A and C together are sufficient.

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