How to calculate the are of rectangle 4cm length × 120mm breadth?

To calculate the area of a rectangle, you simply multiply the length by the breadth.

Given:
Length = 4 cm
Breadth = 120 mm

First, convert the breadth to the same unit as the length. Since 1 cm = 10 mm, we can convert 120 mm to cm by dividing by 10:
120 mm ÷ 10 = 12 cm

Now, calculate the area:
Area = Length x Breadth
Area = 4 cm x 12 cm
Area = 48 cm²

Therefore, the area of the rectangle is 48 cm².

1. Convert millimeters to centimeters: 120 mm = 12 cm

2. Use the formula for the area of a rectangle: A = l × w, where A is the area, l is the length, and w is the width.

3. Substitute the values into the formula: A = 4 cm × 12 cm

4. Calculate the area: A = 48 cm²

Therefore, the area of the rectangle is 48 cm².