NCERT Class 6 Geography — Chapter 1: Globe: Latitudes and Longitudes

mcqeasy

If a place is located at 15° West of Greenwich, what is the time there when it is 12 noon at Greenwich?

Official previous-year question

Verified 1 Aug 2026.

Options

A1:00 p.m.
B10:00 a.m.
C11:00 a.m.
D12:00 midnight

Did you get this right?

Solution

The correct option is

11:00 a.m.

Explanation

The Earth rotates on its axis from West to East, completing a full circle of 360° in approximately 24 hours. This rate of rotation implies that the Earth covers 15° of longitude in one hour (360° ÷ 24 hours = 15°). Consequently, time varies by 4 minutes for every 1° of longitude.

Calculation:

Reference Point: Greenwich (Prime Meridian) is at 0° longitude. The time is given as 12:00 noon.
Target Location: The place is located at 15° West longitude.
Longitudinal Difference: The difference between 0° and 15° W is 15°.
Time Difference: Since 15° corresponds to 1 hour of time difference, the gap is exactly 1 hour.
Directional Adjustment: Places to the West of Greenwich are behind in time (earlier) relative to Greenwich Mean Time (GMT). Therefore, time must be subtracted.
Final Time: 12:00 noon - 1 hour = 11:00 a.m.

Key Takeaway: Local time decreases by one hour for every 15° shift westward from the Prime Meridian and increases by one hour for every 15° shift eastward.

Your note

More from Chapter 1: Globe: Latitudes and Longitudes

Consider the following statements regarding the naming of latitudes: 1. All parallels north of the equator are called 'north latitudes'. 2. All parallels south of the equator are called 'western latitudes'. 3. The value of latitude is followed by the letter 'N' or 'S'. Which of the statements given above is/are correct?

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Which of the following statements is correct regarding the "Torrid Zone"?

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With reference to the shape of the Earth, consider the following statements: 1. The Earth is a perfect sphere with no irregularities. 2. It is slightly flattened at the North and South Poles. 3. It has a bulge in the middle. Which of the statements given above is/are correct?

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Consider the following statements regarding the Globe: 1. It is a true miniature model of the Earth. 2. On a globe, countries and continents are shown in their correct size, but oceans are not. 3. The globe is fixed and cannot be rotated. Which of the statements given above is/are correct?

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With reference to the axis of the Earth, consider the following statements: 1. The axis is a real needle passing through the North and South Poles. 2. The Earth moves around its axis from West to East. 3. The axis is an imaginary line. Which of the statements given above is/are correct?

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The correct option is

11:00 a.m.

Explanation

Calculation:

Reference Point: Greenwich (Prime Meridian) is at 0° longitude. The time is given as 12:00 noon.
Target Location: The place is located at 15° West longitude.
Longitudinal Difference: The difference between 0° and 15° W is 15°.
Time Difference: Since 15° corresponds to 1 hour of time difference, the gap is exactly 1 hour.
Directional Adjustment: Places to the West of Greenwich are behind in time (earlier) relative to Greenwich Mean Time (GMT). Therefore, time must be subtracted.
Final Time: 12:00 noon - 1 hour = 11:00 a.m.

Key Takeaway: Local time decreases by one hour for every 15° shift westward from the Prime Meridian and increases by one hour for every 15° shift eastward.