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

Updated 11 Apr 2026 · From UPSC Prelims GS Paper I 2018, Q28

Contents11
UPSC Prelims GS2018Geography
  1. ABengaluru
  2. BHyderabad
  3. CNagpur
  4. DPune
Show answer

Answer: (A) Bengaluru

Correct Answer: (a) Bengaluru

This is a geography/map-based question about longitudes.

Delhi is located at approximately 77.1° East longitude. Now let's compare:

  • Bengaluru: ~77.6° E — very close to Delhi!
  • Hyderabad: ~78.5° E
  • Nagpur: ~79.1° E
  • Pune: ~73.9° E

Bengaluru's longitude (77.6° E) is closest to Delhi's (77.1° E) — the difference is less than 0.5 degrees.

This might seem surprising because Delhi and Bengaluru are far apart north-to-south, but they lie on almost the same longitude (same vertical line on the map).

REMEMBER: Delhi and Bengaluru share nearly the same longitude (~77° E). Distance on a map doesn't always mean different longitudes — north-south distance doesn't change longitude.

Why this was asked

Delhi and Bengaluru lie on nearly the same longitude line (around 77° East) despite being far apart north-to-south, showing that physical distance doesn't determine longitude difference.

The question tests whether students can distinguish between latitude (north-south position) and longitude (east-west position) - many assume distant cities must have different longitudes.

Longitude Lines & Coordinates

Geography longitude Delhi

Longitude Lines: Key Concepts & UPSC Applications

Must know

Longitude measures east-west position, ranges from 0° to 180° East/West

Cities on same longitude lie on the same vertical line on maps

North-south distance between cities does NOT change their longitude values

Good to know

India spans from 68°7'E to 97°25'E longitude

What is Longitude

Longitude measures how far east or west a place is from the Prime Meridian (0° longitude at Greenwich, UK). Unlike latitude which affects climate, longitude primarily determines time zones and geographical positioning.

Key insight: Cities can be hundreds of kilometers apart north-to-south but still share nearly the same longitude if they lie on the same vertical meridian line.

How Longitude Works

%%{init: {"flowchart": {"wrappingWidth": 460}}}%%
flowchart TD
  s1["`**Prime Meridian (0°)**
Reference line passing through Greenwich, UK`"]
  s2["`**Eastern Longitudes**
0° to 180° East - includes all of India`"]
  s3["`**Western Longitudes**
0° to 180° West - includes Americas`"]
  s4["`**International Date Line**
Roughly follows 180° longitude`"]
  s1 --> s2
  s2 --> s3
  s3 --> s4

Longitude Grid System

Longitude lines run vertically from pole to pole - cities on the same line share the same longitude despite distance
Longitude lines run vertically from pole to pole - cities on the same line share the same longitude despite distance

Source: Britannica — Greenwich meridian | Definition, History, Location, Map, & Facts ... · www.britannica.com

Exam traps

Trap: Assuming cities that are far apart must have different longitudes - Delhi and Bengaluru are 2000+ km apart but share ~77° E

Confusion: Mixing up latitude vs longitude - latitude runs horizontally (affects climate), longitude runs vertically (affects time)

Common error: Thinking western India always has lower longitude - Pune (73.9° E) is west of Delhi (77.1° E) both geographically AND longitudinally

Major Indian Cities Longitude

Geography Bengaluru Hyderabad Nagpur Pune Delhi

Major Indian Cities: Longitude Coordinates & Patterns

Must know

Delhi and Bengaluru both lie near 77° E longitude despite 2000+ km distance

Nagpur is India's geographical center at 79.1° E

Good to know

Pune has the westernmost longitude among major cities at 73.9° E

Indian Cities Longitude Comparison

City

Longitude

State

Key Feature

Delhi

77.1° E

Delhi (NCT)

National Capital

Bengaluru

77.6° E

Karnataka

Closest to Delhi longitude

Hyderabad

78.5° E

Telangana

IT hub, central Deccan

Nagpur

79.1° E

Maharashtra

Geographic center of India

Pune

73.9° E

Maharashtra

Westernmost among options

Indian Cities Map

Notice how Delhi and Bengaluru lie on nearly the same vertical longitude line (~77° E)
Notice how Delhi and Bengaluru lie on nearly the same vertical longitude line (~77° E)

Source: LotusArise — Q. Among the following cities, which one lies on a longitude ... · lotusarise.com

Question Connection

This PYQ tested whether students understand that geographical distance ≠ longitude difference. Delhi-Bengaluru are separated by 2000+ km north-south but only 0.5° longitude - making Bengaluru the closest match among all options.

Exam traps

Visual trap: On most maps, Hyderabad looks closer to Delhi than Bengaluru - but longitude is about east-west position, not visual distance

Regional bias: Students often pick Nagpur thinking 'central India = central longitude' - but Nagpur is actually further east at 79.1° E

Maharashtra confusion: Both Nagpur and Pune are in Maharashtra but have very different longitudes - 79.1° E vs 73.9° E

India's Longitudinal Extent

Geography

India's Longitudinal Extent: Boundaries & Time Zone Impact

Must know

India spans 29°18' longitude from 68°7'E to 97°25'E

Standard Meridian: 82.5° E passes through Mirzapur, UP

Single time zone for entire country despite ~30° longitudinal span

Key Longitude Facts

Westernmost point: 68°7' E at Gujarat-Pakistan border (Rann of Kachchh)

Easternmost point: 97°25' E in Arunachal Pradesh (Dong village)

Time difference: 2 hours between east and west extremes naturally

Tropic of Cancer: Crosses India at 23.5° N affecting 8 states

Geographic center: Nagpur region considered center of Indian landmass

Longitude vs Time Zones

Aspect

Natural (by longitude)

India's Practice

Time zones

Should have 4+ zones

Single zone (IST)

Reference meridian

Multiple meridians

82.5° E (Mirzapur)

Sunrise difference

2 hours east-west gap

Ignored for unity

Examples

Arunachal vs Gujarat

Same time everywhere

Exam traps

Standard Meridian confusion: 82.5° E passes through Mirzapur (UP), not 82° E or other cities

Time zone trap: Despite 30° longitude span, India uses only one time zone - most countries this wide have multiple zones

Boundary mixing: Don't confuse 68°7' E (westernmost longitude) with 68°7' N (impossible latitude for India)