Lesson eLearning

A 1 km long river segment that is 15 m wide loses 0.8 m of depth due to evaporation each day. What is the volume of water lost in litres per day?

hard 3 marks Class 5 · EVS · Every Drop Counts
Answer
12,000,000 litres

The correct answer is 12,000,000 litres — State result

Step-by-step solution

  1. Convert river length to metres: 1 km=1000 m
  2. Use width: 15 m
  3. Use depth loss: 0.8 m
  4. Compute volume: 1000×15×0.8=12,000 m^3
  5. Convert cubic metres to litres: 12,000 m^3×1000=12,000,000 litres
  6. State result
Common mistake: Ignoring conversion from cubic metres to litres

Concept tested: River volume loss calculation

Published · How this solution was prepared and checked

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