The actual dimensions of a rectangle are 9cm by 6cm. Alex measures the sides to be 9.41cm by 6.3cm. In calculating the area, what is the relative error, to the nearest hundredth.Answer:
Q. The actual dimensions of a rectangle are 9cm by 6cm. Alex measures the sides to be 9.41cm by 6.3cm. 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.The formula for the area of a rectangle is length×width.Actual area = 9cm×6cm=54cm2.
Calculate Measured Area: Calculate the measured area of the rectangle using the measured dimensions.Measured area = 9.41cm×6.3cm.Let's perform the multiplication to find the measured area.Measured area = 59.283cm2.
Calculate Absolute Error: Calculate the absolute error by subtracting the actual area from the measured area.Absolute error = Measured area - Actual area.Absolute error = 59.283cm2−54cm2=5.283cm2.
Calculate Relative Error: Calculate the relative error by dividing the absolute error by the actual area.Relative error = Absolute error / Actual area.Relative error = 5.283cm2/54cm2.Let's perform the division to find the relative error.Relative error ≈0.0978333.
Convert to Percentage: Convert the relative error to a percentage and round to the nearest hundredth.Relative error (as a percentage) = Relative error ×100.Relative error (as a percentage) ≈0.0978333×100≈9.78%.