The actual dimensions of a rectangle are 9ft by 6ft. Bob measures the sides to be 8.62ft by 5.88ft. In calculating the area, what is the relative error, to the nearest hundredth.Answer:
Q. The actual dimensions of a rectangle are 9ft by 6ft. Bob measures the sides to be 8.62ft by 5.88ft. In calculating the area, what is the relative error, to the nearest hundredth.Answer:
Calculate actual area: Calculate the actual area of the rectangle using the actual dimensions.Actual area = length×width=9ft×6ft.
Perform actual area calculation: Perform the calculation for the actual area.Actual area = 9ft×6ft=54ft2.
Calculate measured area: Calculate the measured area of the rectangle using Bob's measurements.Measured area = measured length × measured width = 8.62ft×5.88ft.
Perform measured area calculation: Perform the calculation for the measured area.Measured area = 8.62ft×5.88ft≈50.6836ft2.
Calculate absolute error: Calculate the absolute error by subtracting the measured area from the actual area.Absolute error = ∣Actual area−Measured area∣=∣54ft2−50.6836ft2∣.
Perform absolute error calculation: Perform the calculation for the absolute error. Absolute error = ∣54ft2−50.6836ft2∣≈3.3164ft2.
Calculate relative error: Calculate the relative error by dividing the absolute error by the actual area and then multiplying by 100 to get the percentage.Relative error = (Absolute error/Actual area)×100.
Perform relative error calculation: Perform the calculation for the relative error. Relative error = (3.3164ft2/54ft2)×100≈6.1411%.
Round relative error: Round the relative error to the nearest hundredth.Relative error ≈6.14%.