Grade 6 Math Measurement Estimating and measuring length, mass

What is the approximate length of a standard classroom desk in centimetres?

• 50 cm

• 120 cm

• 200 cm

• 300 cm

Answer explanation

A standard classroom desk typically measures around 120 cm in length, making it suitable for student use. The other options, 50 cm, 200 cm, and 300 cm, are either too small or excessively large for a standard desk.

If a bottle can hold 1.5 litres of water, how many millilitres can it hold?

• 150 mL

• 1500 mL

• 15000 mL

• 150000 mL

Answer explanation

1.5 litres is equivalent to 1500 millilitres, since 1 litre equals 1000 millilitres. Therefore, the correct answer is 1500 mL.

Which of the following is the best estimate for the mass of a textbook?

• 200 g

• 1 kg

• 5 kg

• 10 kg

Answer explanation

The best estimate for the mass of a textbook is 1 kg, as most textbooks typically weigh around this amount. 200 g is too light, while 5 kg and 10 kg are too heavy for standard textbooks.

A rectangular garden measures 10 metres by 5 metres. What is the area of the garden?

• 15 m²

• 25 m²

• 50 m²

• 100 m²

Answer explanation

To find the area of a rectangle, multiply its length by its width. Here, the area = 10 m × 5 m = 50 m². Therefore, the correct answer is 50 m².

What is the volume of a cube with side length 3 cm?

• 9 cm³

• 18 cm³

• 27 cm³

• 36 cm³

Answer explanation

The volume of a cube is calculated using the formula V = side³. For a cube with a side length of 3 cm, V = 3³ = 27 cm³. Therefore, the correct answer is 27 cm³.

If a car travels 150 kilometres in 3 hours, what is its average speed in kilometres per hour?

• 30 km/h

• 50 km/h

• 60 km/h

• 75 km/h

Answer explanation

To find the average speed, divide the distance by the time. Here, 150 km ÷ 3 hours = 50 km/h. Therefore, the average speed of the car is 50 km/h.

Which of the following is closest to the mass of a litre of milk?

• 500 g

• 1 kg

• 1.5 kg

• 2 kg

Answer explanation

A litre of milk has a density close to 1 kg/L, making its mass approximately 1 kg. Therefore, the closest answer to the mass of a litre of milk is 1 kg.

A swimming pool is 25 metres long, 10 metres wide, and 2 metres deep. What is the volume of the pool?

• 250 m³

• 500 m³

• 750 m³

• 1000 m³

Answer explanation

To find the volume of the pool, multiply length, width, and depth: 25m x 10m x 2m = 500m³. Therefore, the correct answer is 500 m³.

If a pencil is 0.15 metres long, how many millimetres long is it?

• 15 mm

• 150 mm

• 1500 mm

• 15000 mm

Answer explanation

To convert metres to millimetres, multiply by 1000. Thus, 0.15 metres x 1000 = 150 mm. Therefore, the pencil is 150 mm long.

What is the perimeter of a square with side length 4 metres?

• 8 m

• 12 m

• 16 m

• 20 m

Answer explanation

The perimeter of a square is calculated by the formula P = 4 × side length. For a side length of 4 metres, P = 4 × 4 = 16 metres. Therefore, the correct answer is 16 m.