Loading...
UPSC 1997: P is 300 km eastward of O and Q is 400 km north of O. R is exactly in the middle of Q and P. The distance between Q and R is
(a)250 km
(b)300 km
(c)350 km
(d)250* km
Attempt This Question
Not attemptedCorrect Answer: (a) 250 km
Let O be the origin (0,0). P is at (300, 0) and Q is at (0, 400). The midpoint R of PQ is ((300+0)/2, (0+400)/2) = (150, 200). Distance QR = √[(150−0)²+(200−400)²] = √(150²+200²)=√62500 = 250 km, which matches option (a). ([pdfcoffee.com](https://pdfcoffee.com/general-studies-prelims-paper-1997-list-i-list-ii-climatic-conditions-reasons-pdf-free.html))
Related UPSC Questions
More from Quantitative Aptitude
1997easy
A rectangular plot of lawn shown in the figure has dimensions x and y and is surrounded by a gravel pathway of width 2 m. What is the total area of th
1997easy
The average monthly income of a person in a certain family of 5 is Rs. 1000. What will be the monthly average income of a person in the same family if
1997easy
When three coins are tossed together the probability that all coins have the same face up is
Frequently Asked Questions
What is the correct answer to this UPSC 1997 Science & Technology question?▼
The correct answer is option (a): 250 km. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Quantitative Aptitude question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1997, GS Paper 1, as Question 136. It falls under Science & Technology > Quantitative Aptitude.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Quantitative Aptitude?▼
UPSC has asked 178 questions from Quantitative Aptitude (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.