Maths by beth

Question 1

What metric unit should be used when giving the distance from London to Liverpool?

Answer 1

kilometers

Question 2

How many minutes are there in 2 hours 15 minutes?

Answer 2

There are 60 minutes in 1 hour, so 120 minutes in 2 hours. Therefore, 2 hours 15 minutes is 120 +15 = 135 minutes. This answer would have been correct if the question had asked how many hours.

Question 3

What is 1.25 km in metres?

Answer 3

1250m

Question 4

An object has a density of 11 g/cm3 and a volume of 6 cm3. What is the mass of the object?

Answer 4

The formula density can be re-arranged to give mass = density × volume. The density is 11 g/cm3 and the volume is 6 cm3, so mass = 11 × 6 = 66 g.

Question 5

A bumble bee travels at a speed of 6 mph. How far will the bumble bee have travelled in 40 minutes?

Answer 5

40 minutes is 2}{3} of an hour. The speed is 6 mph, so in 40 minutes the bumble bee will have travelled 2}{3} of 6, which is 4. The speed is 4 mph.