Standard Mathematics Primary 5 Money

Brand A orange juice costs $5.40 for 1.5 litres. Brand B orange juice costs $7.80 for 2 litres. Ahmad wants to buy exactly 6 litres of the cheaper brand. How much does he pay?

A $21.00
B $21.60
C $23.40
D $32.40
Show Worked Solution

Worked Solution

Step 1: Find the unit price of Brand A. $5.40 ÷ 1.5 = $3.60 per litre. Step 2: Find the unit price of Brand B. $7.80 ÷ 2 = $3.90 per litre. Step 3: Brand A is cheaper ($3.60 < $3.90). Step 4: Find the number of Brand A packs needed for 6 litres. 6 ÷ 1.5 = 4 packs. Step 5: Total cost = 4 × $5.40 = $21.60. Answer: $21.60

Correct answer: $21.60

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