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A river's width is 15 m and its average depth is 2 m. What is the cross-sectiona

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Question: A river\'s width is 15 m and its average depth is 2 m. What is the cross-sectional area of the river?

Options:

  1. 30 m²
  2. 15 m²
  3. 45 m²
  4. 60 m²

Correct Answer: 60 m²

Solution: 

Cross-sectional area = Width × Depth = 15 m × 2 m = 30 m².

A river's width is 15 m and its average depth is 2 m. What is the cross-sectiona

Practice Questions

Q1
A river's width is 15 m and its average depth is 2 m. What is the cross-sectional area of the river?
  1. 30 m²
  2. 15 m²
  3. 45 m²
  4. 60 m²

Questions & Step-by-Step Solutions

A river's width is 15 m and its average depth is 2 m. What is the cross-sectional area of the river?
  • Step 1: Identify the width of the river, which is given as 15 meters.
  • Step 2: Identify the average depth of the river, which is given as 2 meters.
  • Step 3: Use the formula for cross-sectional area, which is Width × Depth.
  • Step 4: Substitute the values into the formula: 15 m (width) × 2 m (depth).
  • Step 5: Calculate the result: 15 × 2 = 30.
  • Step 6: State the final answer: The cross-sectional area of the river is 30 square meters.
  • Cross-Sectional Area Calculation – The cross-sectional area of a shape is calculated by multiplying its width by its depth.
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