# Straight Races : Sample Question & Answers

The question is a question from the topic Races and tests your concept about straight race between two contestants A and B.

**Question 2**
In a kilometre race, A can give B a start of 100 m or 15 seconds. How long does A take to complete the race?

- 150 seconds
- 165 seconds
- 135 seconds
- 66.67 seconds
- 180 seconds

Correct Choice is

**(3)**. Correct answer

**135 seconds**.

**Explanatory Answer**
In a 1000 metre race A gives B a start of 100 m or 15 seconds.

This essentially means that B takes 15 seconds to run 100 m.

Therefore, B will take 150 seconds to run the stretch of 1000 metres. (1000 m = 10 times 100 m and therefore the time taken will also be 10 times 15 seconds = 150 seconds).

As A gives B a start of 15 seconds, A obviously takes 15 seconds less than B to complete the race.

Hence, A will take 135 seconds to run the 1000 m.