The actual dimensions of a rectangle are 6cm by 10cm. David measures the sides to be 5.6cm by 10.46cm. In calculating the area, what is the relative error, to the nearest thousandth.Answer:
Q. The actual dimensions of a rectangle are 6cm by 10cm. David measures the sides to be 5.6cm by 10.46cm. In calculating the area, what is the relative error, to the nearest thousandth.Answer:
Calculate Actual Area: First, calculate the actual area of the rectangle using the actual dimensions.Actual area = length×widthActual area = 6cm×10cmActual area = 60cm2
Calculate Measured Area: Next, calculate the measured area of the rectangle using the measured dimensions.Measured area = measured length × measured widthMeasured area = 5.6cm×10.46cmMeasured area = 58.576cm2
Find Absolute Error: Now, find the absolute error by subtracting the actual area from the measured area.Absolute error = ∣Measured area−Actual area∣Absolute error = ∣58.576cm2−60cm2∣Absolute error = ∣−1.424cm2∣Absolute error = 1.424cm2 (since error is always positive)
Calculate Relative Error: To find the relative error, divide the absolute error by the actual area and express it as a decimal.Relative error (as a decimal) = Actual areaAbsolute errorRelative error (as a decimal) = 60cm21.424cm2Relative error (as a decimal) = 0.023733…
Express Relative Error: Finally, express the relative error as a decimal rounded to the nearest thousandth.Relative error (rounded) = 0.024 (rounded to three decimal places)