If a river's width increases from 50 meters to 100 meters while maintaining the
Practice Questions
Q1
If a river's width increases from 50 meters to 100 meters while maintaining the same depth of 3 meters, what is the change in cross-sectional area? (2022)
150 m²
200 m²
300 m²
400 m²
Questions & Step-by-Step Solutions
If a river's width increases from 50 meters to 100 meters while maintaining the same depth of 3 meters, what is the change in cross-sectional area? (2022)
Step 1: Identify the initial width of the river, which is 50 meters.
Step 2: Identify the depth of the river, which is 3 meters.
Step 3: Calculate the initial cross-sectional area using the formula: Area = Width × Depth. So, Area = 50 m × 3 m = 150 m².
Step 4: Identify the final width of the river, which is 100 meters.
Step 5: Calculate the final cross-sectional area using the same formula: Area = Width × Depth. So, Area = 100 m × 3 m = 300 m².
Step 6: Find the change in cross-sectional area by subtracting the initial area from the final area: Change = Final Area - Initial Area. So, Change = 300 m² - 150 m² = 150 m².
