Foundation November 2020 Paper 2 Q15

15 Mortar is made by mixing cement and sand as shown.

For every 1 kg of cement used, add 4 kg of sand

Cement costs £0.19 per kg
Sand costs £0.07 per kg

Tomasz uses 150 kg of cement to make some mortar.

Work out the total cost of the mortar. [3 marks]

Mark scheme

Answer	Mark	Comments
Alternative method 1
\(150 \times 0.19\) or 28.5(0)	M1	oe eg working in pence
\(4 \times 150 \times 0.07\) or 42	M1	oe eg working in pence 70.5 implies M2
70.50	A1	allow £70.50p
Alternative method 2
\(0.19 + 4 \times 0.07\) or 0.47	M1	oe eg working in pence
\(150 \times\) their 0.47 or 70.5	M1dep	oe eg working in pence
70.50	A1	allow £70.50p

70.50 seen in working but answer of 70.5	M2A1
70.5 without 70.50 seen	M2A0
\(4 \times 0.07\) only	M0
\(150 \times 0.19 = 28\) and answer 70 (implies 42)	M2A0
\(150 \times 0.19\) and \(150 \div 4\)	M1M0A0
\(150 \times 0.19 = 28.5\) and \(28.5 \times 4\)	M1M0A0
\(4 \times 150 \times 0.19\)	M0
Allow up to M2 even if not subsequently used