4MA0 Foundation January 2012 Paper 1 Q7
7 The temperature of food in a freezer is −18°C.
The temperature of food in a fridge is 3°C.
(a) What is the difference between the temperature of food in the freezer and the temperature of food in the fridge? (2)
(b) Alison took a pie from the freezer.
The temperature of the pie was −18°C.
One hour later, the temperature of the pie was 11°C higher.
Work out the temperature of the pie after one hour. (2)
The temperature of the pie was −18°C.
One hour later, the temperature of the pie was 11°C higher.
Work out the temperature of the pie after one hour. (2)
(c) At 14 25 Zak takes a chicken from the fridge.
10 minutes later he places the chicken in an oven to cook.
The cooking time is 1 hour 45 minutes.
10 minutes later he places the chicken in an oven to cook.
The cooking time is 1 hour 45 minutes.
(i) Write 14 25 using pm.
(ii) At what time will the chicken be cooked?
(3)| Scheme | Marks |
|---|---|
| 3 + 18 or −18 − 3 | M1 |
| 21 | A1 |
| (2) |
Notes
A1: (accept −21)
| Scheme | Marks |
|---|---|
| −18 + 11 | M1 |
| −7 | A1 |
| (2) |
Notes
A1: cao
| Scheme | Marks |
|---|---|
| (i) Answer: (0)2 25 pm | B1 |
| (ii) 25 + 10 + 45 (=80) or 25 + 10 + 105 (=140) or 14 25 + 2hrs – 5mins or 2.25 + 2hrs – 5 mins or 14 25 + 1 hr 55mins or 2.25 + 1 hr 55 mins | M1 |
| 16 20 | A1 |
| (3) | |
| (Total 7 marks) |
Notes
B1: allow 2.25, 2:25, with leading zeros, 25(mins) past 2 pm
M1: intention to add all minute components
conversion of cooking time to minutes & intention to add
A1: (accept 4.20)