A rectangle has an area of 30 cm² and a width of 5 cm. What is its length?

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Question: A rectangle has an area of 30 cm² and a width of 5 cm. What is its length?

Options:

Correct Answer: 6 cm

Solution:

Area = length × width, so length = Area ÷ width = 30 cm² ÷ 5 cm = 6 cm.

A rectangle has an area of 30 cm² and a width of 5 cm. What is its length?

A rectangle has an area of 30 cm² and a width of 5 cm. What is its length?

Step 1: Understand that the area of a rectangle is calculated by multiplying its length by its width.
Step 2: Write down the formula for area: Area = length × width.
Step 3: We know the area is 30 cm² and the width is 5 cm.
Step 4: To find the length, rearrange the formula to: length = Area ÷ width.
Step 5: Substitute the known values into the formula: length = 30 cm² ÷ 5 cm.
Step 6: Perform the division: 30 ÷ 5 = 6.
Step 7: Therefore, the length of the rectangle is 6 cm.

Area of a Rectangle – The area of a rectangle is calculated by multiplying its length by its width.
Unit Consistency – Ensuring that the units used in calculations are consistent (e.g., cm² for area and cm for length and width).