Explanations:The question pertains to the flood event in Kerala and the percentage increase in rainfall compared to the usual rainfall in the state. To understand this concept, it is essential to know the average rainfall in Kerala and the amount of rainfall during the flood event.
The average rainfall in Kerala is typically around 3000 mm per year. During the flood event, the rainfall was significantly higher, leading to a substantial increase in the total amount of water received by the state. The percentage increase in rainfall is calculated by comparing the excess rainfall during the flood to the average rainfall.
The formula to calculate the percentage increase is:
\[
\text{Percentage Increase} = \left( \frac{\text{Excess Rainfall}}{\text{Average Rainfall}} \right) \times 100
\]
In this case, the excess rainfall during the flood was such that it resulted in a 75% increase over the usual rainfall. This means that the rainfall during the flood was 175% of the average rainfall, or 75% more than the usual amount.
Understanding the percentage increase is crucial for assessing the severity of the flood event and its impact on the state. It helps in planning and implementing measures to mitigate the effects of such events in the future.
It is important to note that the percentage increase is a relative measure and does not directly indicate the total amount of rainfall. The actual amount of rainfall during the flood was significantly higher than the average, leading to severe flooding and its associated impacts.
Common misconceptions include confusing the percentage increase with the total amount of rainfall or misinterpreting the data provided. It is essential to carefully analyze the information and apply the correct formula to determine the percentage increase accurately.