Pearson Edexcel International GCSE (9–1) · MATHEMATICS A · Chapter
Number 8
18 practice questions
Practice questions
1–3 of 3 · Hard
Question 1
2 marks · Hard
Answer and see the solution →A piece of string is 1.85 metres long. Write this length in millimetres, giving your answer in standard form.
Question 2
4 marks · Hard
Answer and see the solution →A block of plastic has a mass of 2.4 kg and occupies a volume of 1500 cm³.
(a)[1 mark]Convert the mass to grams (g).
(b)[2 marks]Work out the density of the plastic in g/cm³.
(c)[1 mark]Express your answer to part (b) in kg/m³.
Question 3
4 marks · Hard
Answer and see the solution →A swimming pool is 25 m long, 8 m wide, and has an average depth of 2 m. The pool is filled with water at a rate of 40 litres per minute.
(a)[1 mark]Calculate the total volume of the pool in cubic metres (m³).
(b)[1 mark]Work out how many litres of water are needed to fill the pool. (1 m³ = 1000 litres)
(c)[2 marks]Estimate how many hours it will take to fill the pool at the given rate. Show your reasoning.