Previous year MCQs

Aptitude & Reasoning UPPSC 2024 GS-I
Question

A bus covers the first half of a certain distance with speed v1 and the second half with a speed v2. The average speed during the whole journey is:

Answer & Solution

Answer: (Detailed Solution Below)

Option C: (v1+v2)/2

Detailed Solution:

The correct answer is “(v1+v2)/2”.

The formula for the average speed when the distance is divided into two equal parts and each part is covered with different speeds is given by the harmonic mean: 2v1v2/(v1+v2)

Similar Questions:

A bus covers the first half of a certain distance with speed v1 and the second half with a speed v2. The average speed during the whole journey is:
  1. A) v1v2/(v1+v2)
  2. B) 2v1v2/(v1+v2)
  3. C) (v1+v2)/2
  4. D) √v1v2
Write in descending order the following States on the basis of their population as per Census, 2011:

1. Bihar 2. Andhra Pradesh
3. Uttar Pradesh 4. West Bengal

Choose the correct answer with the help of the following codes:
  1. A) 3,4,1,2
  2. B) 1,3,2,4
  3. C) 1,3,4,2
  4. D) 3,1,4,2
If 10, 20,31, A, 56, 70 is a series then what is the value of A?
  1. A) 42
  2. B) 43
  3. C) 44
  4. D) None of the above
Which of the following statements is not true about "ecological niche"?
  1. A) Dominant species occupy extensive and broader ecological niche.
  2. B) Number of species becomes large in ecological niche of natural ecosystem, if resources are sufficient.
  3. C) Number of species becomes small in ecological niche if resources are sufficient.
  4. D) Dominance of single species becomes minimum if the resource distribution is equitable in a habitat.
If ‘COLD’ is coded as DPME the code for CHINA will be:
  1. A) DHIMB
  2. B) DJKMB
  3. C) DUOB
  4. D) DIJPB
The circumference of a circle shown in the above figure is:
  1. A) 4 √2Π
  2. B) 8 √2Π
  3. C) 8Π
  4. D) 16Π
The missing numbers in the following series: 4,18,8,14,12,10......are:
  1. A) 6, 16
  2. B) 16,6
  3. C) 8, 6
  4. D) None of the above
If the length of a rectangle is increased by 20% and its width is decreased by 20%, its area will:
  1. A) increase by 4%
  2. B) decrease by 4%
  3. C) increase by 20%
  4. D) decrease by 20%
The above diagram shows the population of a town. If the total population of the town is 7,20,000 then the number of animals in the town is
  1. A) 30,000
  2. B) 40,000
  3. C) 50,000
  4. D) 60,000
The cost price of an article is Rs. 100/- To gain 50% after allowing a 50% discount, the marker price of the article is:
  1. A) Rs.200/-
  2. B) Rs. 400/-
  3. C) Rs. 350/-
  4. D) Rs. 300/-
If RUNNER is coded by SUMMER, the code for WINTER Will be
  1. A) XIMSER
  2. B) VINTER
  3. C) SINVER
  4. D) VIOUER
With reference to the Anti-Maoist operation that took place in April 2024, which of the following statements is/are correct?

1. It took place in Gadchiroli district of Maharashtra.
2. The operation was launched by BSF and District Reserve Guards.

Select the correct answer from the codes given below:
  1. A) Only 2
  2. B) Neither 1 nor 2
  3. C) Only I
  4. D) Both 1 and 2