A river has a length of 150 km and a width of 50 m. What is the area of the rive
Practice Questions
Q1
A river has a length of 150 km and a width of 50 m. What is the area of the river? (2020)
750,000 m²
1,500,000 m²
3,000,000 m²
5,000,000 m²
Questions & Step-by-Step Solutions
A river has a length of 150 km and a width of 50 m. What is the area of the river? (2020)
Step 1: Understand that the area of a rectangle (or in this case, the river) is calculated by multiplying its length by its width.
Step 2: Convert the length of the river from kilometers to meters. Since 1 kilometer is equal to 1,000 meters, multiply 150 km by 1,000 to get 150,000 meters.
Step 3: The width of the river is already given in meters, which is 50 m.
Step 4: Now, multiply the length (150,000 m) by the width (50 m) to find the area: 150,000 m x 50 m.
Step 5: Calculate the multiplication: 150,000 x 50 = 7,500,000 m².
Step 6: The area of the river is 7,500,000 square meters.
Area Calculation – The area of a rectangular shape is calculated by multiplying its length by its width.
Unit Conversion – Understanding the need to convert units (km to m) when calculating area.
