A-LevelMathematicsDifferentiationOct/Nov 2010Paper 1 Q1010 Marks
The diagram shows an open rectangular tank of height h metres covered with a lid. The base of the tank has sides of length x metres and 5/4x metres and the lid is a rectangle with sides of length x metres and 5/4x metres. When full the tank holds 4 m³ of water. The material from which the tank is made is of negligible thickness. The external surface area of the tank together with the area of the top of the lid is A m².
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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