EduFarming
Your list · 0हिं

Type at least two letters. Press Esc to close.

↑↓ navigate↵ openTAB cycle filter

Alligation & Mixtures · Question 83 of 88

How much pure mustard oil is in the drum after three mornings?

Question 83

MediumOriginal question

A 50-litre drum is full of pure mustard oil. Every morning 5 litres are drawn off and replaced with a cheaper oil.

How much pure mustard oil is in the drum after three mornings?

Options for question 83

Show the answer and explanation
CorrectNot quiteAnswer B

Correct answer: B

Explanation

  1. 50×0.93=50×0.72950 \times 0.9^{3} = 50 \times 0.729.

  2. =36.45= 36.45 litres.

Worth noting

35.5 litres subtracts a full 5 litres of pure oil on the third morning.

Concept
What is left after replacement
Typical time
120 s
Your time
—
The rule this testsRepeated replacement
Practise this chapter →

Ten questions from Alligation & Mixtures, at your own pace.

Practise this chapter →

Ten questions from Alligation & Mixtures, at your own pace.

Practise this chapterAll 88 questions in Alligation & MixturesRevise the notes for Alligation & Mixtures