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A chicken needs to be cooked for 20 minutes per pound, plus an extra
30 minutes. How long would a 7-pound chicken need cooking for?
A pack of 12 pens costs £3.60. How much does one pen cost?
I buy a packet of Captain Crunch cereal. It normally has 600g, but has
20% extra free. How many grams is there in the packet?
A 200 costs £40 for an adult and £28 for a child entry.
How much for 2 adults and 2 children?
A cuboid measures 4 cm by 3 cm by 2 cm. What is the volume?
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Answers
Given:
A chicken needs to be cooked for 20 minutes per pound, plus an extra 30 minutes.
A pack of 12 pens costs £3.60.
I buy a packet of Captain Crunch cereal. It normally has 600g, but has 20% extra free.
A 200 costs £40 for an adult and £28 for a child entry.
A cuboid measures 4 cm by 3 cm by 2 cm.
To find:
How long would a 7-pound chicken need cooking for?
How much does one pen cost?
How many grams is there in the packet?
How much for 2 adults and 2 children?
What is the volume?
Solution:
From given, we have,
A chicken needs to be cooked for 20 minutes per pound, plus an extra 30 minutes.
⇒ For 1 pound = 20 minutes per pound + extra 30 minutes.
⇒ For 7 pound = 7 × (20 minutes per pound) + extra 30 minutes.
140 minutes + extra 30 minutes = 170 minutes.
A pack of 12 pens costs £ 3.60.
⇒ 12 pens = £ 3.60.
⇒ 1 pen = £3.60/12 = £0.3
I buy a packet of Captain Crunch cereal. It normally has 600g, but has 20% extra free.
⇒ 600g, but has 20% extra free.
⇒ 600g + 20% of 600g
⇒ 600 g + 20/100 × 600g
⇒ 600g + 120g
⇒ 720 g
A 200 costs £40 for an adult and £28 for a child entry.
⇒ 200 costs £40 ⇒ 1 costs £40/200 ⇒ 1 costs £0.2 (adult)
⇒ 200 costs £28 ⇒ 1 costs £28/200 ⇒ 1 costs £0.14 (child)
2 adults = 2 × 0.2 = £0.4
2 children = 2 × 0.14 = £0.28
A cuboid measures 4 cm by 3 cm by 2 cm.
⇒ Volume of cuboid = l × w × h = 4 × 3 × 2
⇒ Volume of cuboid = 24 cm³