Question 27
EasyOriginal questionA runs 100 m in 15 seconds. He gives B a start of 10 seconds, and they finish together. How long does B take to run 100 m?
Show the answer and explanation
CorrectNot quiteAnswer D
Correct answer: D
Explanation
B sets off 10 seconds before A and they reach the line together.
So B runs for seconds.
Worth noting
5 seconds subtracts the start; B is the slower runner and takes longer.
- Concept
- A start given in time
- Typical timeTypical
- 60 s
- Your timeYours
- —
Practise this chapter →
Ten questions from Races & Games, at your own pace.