Lesson eLearning

In Mumbai, a traffic rule reduces the number of vehicles by 20%. If the daily pollution level is 180 units, how many units will be reduced?

medium MCQ 2 marks Class 4 · EVS · Nandita in Mumbai
  1. 36 units
  2. 28 units
  3. 40 units
  4. 48 units
Answer
36 units

The correct answer is 36 units — Step 4: State the reduced pollution units = 36 units.

Step-by-step solution

  1. Step 1: Identify daily pollution level = 180 units.
  2. Step 2: Identify reduction percentage = 20% = 0.20.
  3. Step 3: Multiply pollution level by reduction percentage: .
  4. Step 4: State the reduced pollution units = 36 units.
Common mistake: Using 0.02 instead of 0.20

Concept tested: Percentage reduction of pollution

Published · How this solution was prepared and checked

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