EduFarming
Your list · 0हिं

Type at least two letters. Press Esc to close.

↑↓ navigate↵ openTAB cycle filter

Time, Speed & Distance · Question 16 of 71

Question 16

MediumOriginal question

Two friends walk the same distance. Their speeds are in the ratio 3:43 : 4, and the slower friend takes 20 minutes longer. How long does the faster friend take?

Options for question 16

Show the answer and explanation
CorrectNot quiteAnswer D

Correct answer: D

Explanation

  1. Times are in the inverse ratio 4:34 : 3.

  2. The difference 4−3=14 - 3 = 1 part = 20 minutes.

  3. Faster friend's time = 3 parts = 60 minutes.

Worth noting

20 minutes is only the difference between the two times, which is one part of the ratio. The faster friend's time is 3 such parts.

Concept
Inverse ratio of speeds gives the ratio of times
Typical time
60 s
Your time
—
The rule this testsSpeed, conversion and average speed
Practise this chapter →

Ten questions from Time, Speed & Distance, at your own pace.

Practise this chapter →

Ten questions from Time, Speed & Distance, at your own pace.

Practise this chapterAll 71 questions in Time, Speed & DistanceRevise the notes for Time, Speed & Distance