M1.1 Practicalities of Measurement #1

A builder measures a plank as 2.467 m long. This measurement is recorded to:

• 2 decimal places

• 2 significant figures

• 3 decimal places

• 3 significant figures

A length is given as 3.6 cm correct to the nearest millimetre.
What is the lower bound of the measurement?

• 0.1 mm

• 0.1 cm

• 3.60 cm

• 3.65 cm

A rope is measured as 8.2 m. What is the percentage error in the measurement?

• 0.61%

• 1.21%

• 2.44%

• 3.5%

A rectangular swimming pool measures 8.5 m in length and 4.2 m in width. The measurements are correct to the nearest 0.1 m. Which of the following represents the maximum possible area of the pool, in square metres?

• 35.0675 m²

• 35.7 m²

• 36.3375 m²

• 37.23 m²

A tank holds 2.35 kL of water. How many litres is this?

• 235 L

• 2,350 L

• 23,500 L

• 235 000 L