Lesson eLearning

A puddle covers an area of 1.5 m² and evaporates 4 mm of water in a day. How many litres of water have evaporated?

easy MCQ 1 mark Class 5 · EVS · Blow Hot Blow Cold
  1. 4
  2. 6
  3. 8
  4. 10
Answer
6

The correct answer is 6 — Hence the puddle loses 6 litres of water.

Step-by-step solution

  1. Convert the depth of evaporation from millimetres to metres: 4 mm = 0.004 m.
  2. Multiply the depth by the area to find the volume in cubic metres: 1.5 m² × 0.004 m = 0.006 m³.
  3. Convert cubic metres to litres: 0.006 m³ × 1000 L/m³ = 6 L.
  4. Hence the puddle loses 6 litres of water.
Common mistake: Forgetting to convert millimetres to metres or to multiply by the area before converting units.

Concept tested: Evaporation volume calculation

Published · How this solution was prepared and checked

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