Subject: General Aptitude · Chapter: Time and Distance · Exam: · Marks: · Difficulty:
An athlete claimed that his timing for a 100 m dash should be corrected because the starting signal was given by a gun fired from a point 10 m away from him and the timekeeper was standing close to the gun. The error due to this could be (in seconds) [Given: speed of sound $=\mathrm{300 ~ m} / \mathrm{s}$ ]
(a)0.03
(b)0.1
(c)0.5
(d)0.7
Answer
Answer (as printed): A
Explanation
Error = Time taken to cover 10 m at 300 m/sec $$=\left(\frac{10}{300}\right) \sec =\frac{1}{30} \sec \approx 0.03 \mathrm{sec} .$$
Explanation as extracted from the printed page; notation may be imperfect.