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Class 10 · Geography

Longitude and solar time

Interactive explanation Gamified quiz, feedback & rewards

0 XP0 mastered
Suggested-level exploration · Learning goals & preparation

By the end, you can…

  • Explain Time difference = (longitude − reference) × 4 minutes
  • Change one input at a time and predict its effect before checking the model.
  • Apply the relationship in a quiz and explain the reasoning behind your answer.

Useful preparation: Directions, units and interpreting maps. Suggested previous stop: Read contour lines.

This topic has a suggested learning level. A matching chapter in the current NCERT edition has not been verified, so it is not labelled as syllabus coverage.

Interactive exploration · Class 10

Longitude and solar time

Class 10
Solar time difference (min)-835-40328.8461893-1800180Longitude (° east)Reference longitude (° east) held at 0 · scale adjusts to values
The relationshipTime difference = (longitude − reference) × 4 minutes
01 · How to explore

Make the idea your own

  1. 1Read the inputs and predict what will change.
  2. 2Change one parameter while keeping the other fixed.
  3. 3Explain the result using the diagram and the live values.
02 · Take it further

Notice the pattern

East is ahead in this model. Differences are unwrapped, so no date-line correction is applied.