She bakes exactly 15 loaves.

Question 54

MediumOriginal question

A baker has 18 kg of flour for the day. A loaf of bread uses 0.4 kg of flour and a cake uses 0.6 kg. She must bake at least 15 loaves for her regular customers.

She bakes exactly 15 loaves. How many cakes can she bake at most?

10

Correct answerYour answer

20

Correct answerYour answer

25

Correct answerYour answer

30

Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer B

Correct answer: B

15 loaves use $15 \times 0.4 = 6$ kg, leaving 12 kg.
$0.6y \le 12 \Rightarrow y \le 20$ .

Worth noting

30 cakes ignores the flour the loaves use.

Concept: Solving after one variable is fixed
Typical timeTypical: 120 s
Your timeYours: —

The rule this testsSolving inequations

Practise this chapter →

Ten questions from Numerical Inequalities, at your own pace.

Practise this chapter →

Ten questions from Numerical Inequalities, at your own pace.

She bakes exactly 15 loaves.

Question 54

Explanation