A river basin has an area of 500 km². If the average rainfall is 800 mm per year, what is the total volume of water received by the basin in a year? (2019)
Practice Questions
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Q1
A river basin has an area of 500 km². If the average rainfall is 800 mm per year, what is the total volume of water received by the basin in a year? (2019)
400,000,000 m³
500,000,000 m³
600,000,000 m³
700,000,000 m³
Volume = area × rainfall = 500 km² × 800 mm = 500,000,000 m³.
Questions & Step-by-step Solutions
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Q
Q: A river basin has an area of 500 km². If the average rainfall is 800 mm per year, what is the total volume of water received by the basin in a year? (2019)
Solution: Volume = area × rainfall = 500 km² × 800 mm = 500,000,000 m³.
Steps: 9
Step 1: Understand the area of the river basin, which is given as 500 km².
Step 2: Understand the average rainfall, which is given as 800 mm per year.
Step 3: Convert the rainfall from millimeters to meters because we want to calculate volume in cubic meters. 800 mm = 0.8 m.
Step 4: Use the formula for volume, which is Volume = Area × Rainfall.
Step 5: Substitute the values into the formula: Volume = 500 km² × 0.8 m.
Step 6: Convert the area from km² to m². 1 km² = 1,000,000 m², so 500 km² = 500,000,000 m².
Step 7: Now calculate the volume: Volume = 500,000,000 m² × 0.8 m.
