A river has a length of 200 km and a width of 50 m. What is the area of the rive
Practice Questions
Q1
A river has a length of 200 km and a width of 50 m. What is the area of the river's surface? (2021)
1000000 m²
5000000 m²
2000000 m²
100000 km²
Questions & Step-by-Step Solutions
A river has a length of 200 km and a width of 50 m. What is the area of the river's surface? (2021)
Step 1: Convert the length of the river from kilometers to meters. Since 1 kilometer equals 1000 meters, multiply 200 km by 1000. This gives you 200,000 meters.
Step 2: Identify the width of the river, which is already given as 50 meters.
Step 3: Use the formula for area, which is Area = Length × Width. Substitute the values you have: Area = 200,000 m × 50 m.
Step 4: Calculate the area. Multiply 200,000 by 50 to get 10,000,000 square meters.
Area Calculation – The question tests the ability to calculate the area of a rectangular surface using the formula Area = Length × Width.
Unit Conversion – The question requires understanding of unit conversion, as the length is given in kilometers and needs to be converted to meters.
