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Japhet is making small rectangular tiles for a mosaic. Each tile has an area of 7cm^(2) and is 1(1)/(4)cm wide.
How long is each tile?

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cm

Japhet is making small rectangular tiles for a mosaic. Each tile has an area of 7cm27\,\text{cm}^2 and is 114cm1\frac{1}{4}\,\text{cm} wide. \newlineHow long is each tile?\newlinecm\square \,\text{cm}

Full solution

Q. Japhet is making small rectangular tiles for a mosaic. Each tile has an area of 7cm27\,\text{cm}^2 and is 114cm1\frac{1}{4}\,\text{cm} wide. \newlineHow long is each tile?\newlinecm\square \,\text{cm}
  1. Convert to Improper Fraction: Convert the mixed number for the width of the tile to an improper fraction.\newline1141\frac{1}{4}cm = 1+14=44+14=541 + \frac{1}{4} = \frac{4}{4} + \frac{1}{4} = \frac{5}{4} cm
  2. Use Area Formula: Use the area formula for a rectangle, which is Area=width×length\text{Area} = \text{width} \times \text{length}. We know the area (7cm27\,\text{cm}^2) and the width (54cm\frac{5}{4}\,\text{cm}), so we can solve for the length.
  3. Rearrange for Length: Rearrange the area formula to solve for the length. Length=AreawidthLength = \frac{Area}{width}
  4. Substitute Values: Substitute the known values into the formula.\newlineLength = 7cm254cm\frac{7\,\text{cm}^2}{\frac{5}{4}\,\text{cm}}
  5. Perform Division: Perform the division to find the length.\newlineLength = 7cm2×(45cm)17\text{cm}^2 \times (\frac{4}{5} \text{cm})^{-1}\newlineLength = 7cm2×457\text{cm}^2 \times \frac{4}{5}\newlineLength = 285\frac{28}{5}\newlineLength = 5.6cm5.6 \text{cm}

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