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Doctors Medicines MCQs Q&A

  1. Statement I and II are sufficient to answer
  2. Statement II and III are sufficient to answer
  3. Both the statements are required to answer
  4. Any two of the three statements is sufficient to answer
  5. All three statements together sufficient to answer
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1 Answers

Option 5 : All three statements together sufficient to answer

From statement I, II, and III,

Let the distances to be covered from P to Q and Q to R be 3x and 4x respectively.

⇒ Total distance covered = 3x + 4x = 7x

Average speed = (Total distance)/(Total time)

⇒ 7x/7 = 20

⇒ x = 20 km

Now, distance travelled from city P to city Q = 3x = 60 km

Let the time of this journey be ‘t’

⇒ 60/t = 20

⇒ t = 3 hours

Thus, time taken for a journey from city Q to city R = 7 – 3 = 4 hours

Distance travelled in this journey = 4x = 80 km

⇒ Average speed on the journey from city Q to city R = 80/4 = 20 km/hr

∴ Statement I, II and III are together sufficient

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