The average rainfall of a country is a figure, which is averaged over a period of
- A10 years
- B15 years
- C35 yearsCorrect
- D100 years
Solution
Concept
Normal rainfall
Step-by-step solution
1. Normal rainfall is the mean of rainfall over a standard period. 2. IMD uses a 30–35 year period.
Explanation
A long period removes year-to-year variation.
Why the other options are wrong
10 and 15 years are too short; 100 years is not used.
Shortcut
Normal = 30–35 years.
Correct answer: C) 35 years