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Q29 (IAS/2018) Geography ā€ŗ Maps & Locations ā€ŗ Geographical lines and coordinates Official Key

Among the following cities, which one lies on a longitude closest to that of Delhi ?

Result
Your answer: ā€”  Ā·  Correct: A
Explanation

The correct answer is option A - Bengaluru.

Delhi's and Bengaluru's latitudes are 29Ā°N and 13Ā°N; their longitudes are almost the same, 77Ā°E.[1] This directly establishes that Bengaluru's longitude is very close to Delhi's longitude of 77Ā°E. The document explicitly states that their longitudes are "almost the same," making Bengaluru the city with the closest longitude match to Delhi among all the given options.

While the other cities (Hyderabad, Nagpur, and Pune) are also located in central or peninsular India, their longitudes deviate more from Delhi's 77Ā°E. Hyderabad lies at approximately 78Ā°E, Nagpur at around 79Ā°E, and Pune at approximately 74Ā°E. Among these options, Bengaluru's longitude of 77Ā°E makes it virtually identical to Delhi's longitude, despite the significant difference in their latitudes (Delhi at 29Ā°N and Bengaluru at 13Ā°N). The question specifically asks about longitude proximity, not overall geographical distance, making Bengaluru the clear correct answer.

Sources
  1. [1] Exploring Society:India and Beyond. Social Science-Class VI . NCERT(Revised ed 2025) > Chapter 1: Locating Places on the Earth > Questions, activities and projects > p. 24
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Donā€™t just practise ā€“ reverse-engineer the question. This panel shows where this PYQ came from (books / web), how the examiner broke it into hidden statements, and which nearby micro-concepts you were supposed to learn from it. Treat it like an autopsy of the question: what might have triggered it, which exact lines in the book matter, and what linked ideas you should carry forward to future questions.
Q. Among the following cities, which one lies on a longitude closest to that of Delhi ? [A] Bengaluru [B] Hyderabad [C] Nagpur [D] Pune
At a glance
Origin: Mixed / unclear origin Fairness: Low / Borderline fairness Books / CA: 2.5/10 Ā· 0/10
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This question is a classic 'Hidden Gem' from basic NCERTs. It wasn't a random map question; it was lifted verbatim from a 'Questions & Activities' box in the Class VI Geography textbook. The lesson: Do not skip the exercises at the end of NCERT chaptersā€”UPSC setters use them to frame 'logical' questions.

How this question is built

This question can be broken into the following sub-statements. Tap a statement sentence to jump into its detailed analysis.

Statement 1
Is Bengaluru's longitude the closest to Delhi's longitude among the cities Bengaluru, Hyderabad, Nagpur, and Pune?
Origin: Direct from books Fairness: Straightforward Book-answerable
From standard books
Exploring Society:India and Beyond. Social Science-Class VI . NCERT(Revised ed 2025) > Chapter 1: Locating Places on the Earth > Questions, activities and projects > p. 24
Presence: 5/5
ā€œWhat is the difference between local time and standard time? Discuss it in groups, with each group writing an answer in 100 to 150 words. Compare the answers.ā€¢ 6. Delhi's and Bengaluru's latitudes are 29Ā°N and 13Ā°N; their longitudes are almost the same, 77Ā°E. How much will be the difference in local time between the two cities?ā€¢ 7.ā€
Why this source?
  • Explicitly states Delhi's and Bengaluru's longitudes are 'almost the same, 77Ā°E'.
  • Directly compares the two cities' longitudes, implying minimal or zero longitudinal difference.
Exploring Society:India and Beyond. Social Science-Class VI . NCERT(Revised ed 2025) > Chapter 1: Locating Places on the Earth > DON'T MISS OUT > p. 16
Presence: 4/5
ā€œAs you can see on the globe of meridians of longitudes, 180Ā°W and 180Ā°E are the same longitude; so this longitude is noted 180Ā°, omitting the letter W or E. Latitude and longitude together are the two coordinates of a place. With them, you are now able to locate any place on Earth! You can now understand a statement such as "Delhi lies at 29Ā°N latitude and 77Ā°E longitude" (these values are rounded off, not exact). Fig. 1.3 on page 15 shows the parallels of latitude and the meridians of longitude together on the globe as blue lines.ā€
Why this source?
  • Confirms Delhi's longitude as 77Ā°E, providing the reference meridian for comparison.
  • Reinforces the numeric longitude value used in the direct Delhiā€“Bengaluru comparison.
Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 18: Latitudes and Longitudes > 18. Latitudes and Longitudes > p. 240
Presence: 3/5
ā€œā€¢ Latitudes and Longitudes (coordinate system) are imaginary lines used to determine the location of a place on earth. For example, New Delhi is situated near the intersection of 28Ā° N Latitude and 77Ā° E Longitude.ā€
Why this source?
  • Affirms New Delhi is situated near 28Ā°N latitude and 77Ā°E longitude, supporting the Delhi longitude value.
  • Provides additional authoritative sourcing for Delhi's longitude used in the comparison.
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Statement analysis

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Statement analysis

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