Lesson eLearning

Calculate the average interval (in years) between the five major phases of Indian nationalism listed below: Moderate Phase (1885‑1905), Extremist Phase (1905‑1919), Non‑Cooperation Movement (1920‑1922), Civil Disobedience Movement (1930‑1934), and Quit India Movement (1942‑1945).

hard 4 marks Class 10 · History · Nationalism in India
Answer
14.25 years

The correct answer is 14.25 years — State the average interval as the final answer.

Step-by-step solution

  1. List the starting years of each phase: 1885, 1905, 1920, 1930, 1942.
  2. Find the gaps between successive start years: 1905‑1885=20, 1920‑1905=15, 1930‑1920=10, 1942‑1930=12.
  3. Add the four gaps: 20+15+10+12=57 years.
  4. Divide the total gap by the number of intervals (4) to obtain the average: 57÷4=14.25 years.
  5. State the average interval as the final answer.
Common mistake: Dividing the total span (1942‑1885) by 5 instead of dividing the sum of gaps by 4

Concept tested: Calculating intervals between nationalist phases

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