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3.

You measure the width of a doorway and find that it is 1.1 m wide. Find the greatest possible error of your measurement.

0.005 m

0.001 m

0.01 m

0.05 m

1 answer

To determine the greatest possible error of a measurement, we typically consider the least significant digits in the measurement.

Since you measured the doorway width as 1.1 m, the measurement is given to one decimal place. The rule of thumb for greatest possible error is half of the value of the smallest unit of measurement, which in this case is:

  1. The smallest unit of measurement here is 0.1 m (the digit in the tenths place).
  2. Half of 0.1 m is 0.05 m.

So, the greatest possible error of your measurement is 0.05 m.