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Gabriel is designing a rectangular planter box for their garden. It needs to cover an area of 
15(1)/(2)m^(2). Gabriel wants it to be 
7(3)/(4)m long.
How wide does the planter box need to be?
_____

Gabriel is designing a rectangular planter box for their garden. It needs to cover an area of 1512 m2 15 \frac{1}{2} \mathrm{~m}^{2} . Gabriel wants it to be 734 m 7 \frac{3}{4} \mathrm{~m} long.\newlineHow wide does the planter box need to be?\newline_____\_\_\_\_\_ m

Full solution

Q. Gabriel is designing a rectangular planter box for their garden. It needs to cover an area of 1512 m2 15 \frac{1}{2} \mathrm{~m}^{2} . Gabriel wants it to be 734 m 7 \frac{3}{4} \mathrm{~m} long.\newlineHow wide does the planter box need to be?\newline_____\_\_\_\_\_ m
  1. Area Formula Calculation: To find the width of the planter box, we need to use the area formula for a rectangle, which is Area=length×width\text{Area} = \text{length} \times \text{width}. We are given the area and the length, so we can solve for the width.
  2. Conversion to Improper Fractions: First, let's convert the mixed numbers to improper fractions to make the calculations easier. The area is 151215\frac{1}{2} m2^2, which is (15×2+1)/2=312(15\times2 + 1)/2 = \frac{31}{2} m2^2. The length is 7347\frac{3}{4} m, which is (7×4+3)/4=314(7\times4 + 3)/4 = \frac{31}{4} m.
  3. Setting up Equation: Now, we can set up the equation to solve for the width ww: 312m2=314m×w\frac{31}{2} m^2 = \frac{31}{4} m \times w.
  4. Solving for Width: To find ww, we divide both sides of the equation by the length (31/4)m(31/4)\,\text{m}: w=(31/2)m2÷(31/4)mw = (31/2)\,\text{m}^2 \div (31/4)\,\text{m}.
  5. Dividing Fractions: Dividing the fractions by multiplying by the reciprocal, we get: w=(312)m2×(431)m1w = \left(\frac{31}{2}\right) m^2 \times \left(\frac{4}{31}\right) m^{-1}.
  6. Simplifying Equation: Simplifying the equation, we cancel out the common factor of 3131: w=(12)m2×4m1w = (\frac{1}{2}) m^2 \times 4 m^{-1}.
  7. Final Width Calculation: Multiplying the remaining numbers, we get: w=2mw = 2 \, \text{m}. This is the width of the planter box.

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