Calculate Rectangle Area: 4 2/3 by 2 1/4 Meters

Question

What is the area of the rectangle whose length 423 4\frac{2}{3} meters and the width 214 2\frac{1}{4} ?

Video Solution

Solution Steps

00:00 Find the area of the rectangle
00:03 We'll use the formula for calculating the area of a rectangle
00:07 Length times width, we'll substitute the side lengths according to the given data
00:13 Convert mixed numbers to fractions
00:42 Make sure to multiply numerator by numerator and denominator by denominator
00:47 Calculate the multiplications
00:50 Break down the fraction into whole number and remainder
01:09 Break down 12 into factors 6 and 2
01:12 Simplify what's possible
01:17 And this is the solution to the problem

Step-by-Step Solution

To solve this problem, we'll proceed as follows:

  • Step 1: Convert the mixed numbers to improper fractions.
  • Step 2: Multiply the fractions to find the area.
  • Step 3: Convert the result back to a mixed number, if applicable.

Let's work through these steps:

Step 1: First, convert the mixed numbers to improper fractions.

The length is 4234\frac{2}{3} meters. Convert this to an improper fraction: 423=4×3+23=12+23=143 4\frac{2}{3} = \frac{4 \times 3 + 2}{3} = \frac{12 + 2}{3} = \frac{14}{3}

The width is 2142\frac{1}{4} meters. Convert this to an improper fraction: 214=2×4+14=8+14=94 2\frac{1}{4} = \frac{2 \times 4 + 1}{4} = \frac{8 + 1}{4} = \frac{9}{4}

Step 2: Multiply these improper fractions to find the area.

Thus, the area AA of the rectangle in square meters is: A=143×94=14×93×4=12612 A = \frac{14}{3} \times \frac{9}{4} = \frac{14 \times 9}{3 \times 4} = \frac{126}{12}

Simplify the fraction 12612\frac{126}{12}:

Both the numerator and the denominator can be divided by 6: 126÷612÷6=212 \frac{126 \div 6}{12 \div 6} = \frac{21}{2}

Step 3: Convert the improper fraction back to a mixed number:

212=1012 \frac{21}{2} = 10\frac{1}{2}

Therefore, the area of the rectangle is 1012 10\frac{1}{2} square meters.

Answer

1012 10\frac{1}{2}