An athlete runs 200 meters race in 24 seconds. His speed in km/h is
A. 20
B. 24
C. 28.5
D. 30
Answer: Option D
Solution (By Examveda Team)
$$\eqalign{ & {\text{Speed of athlete}}, \cr & = \frac{{200\,{\text{m}}}}{{24\,{\text{secs}}}} \cr & = \frac{{200 \times 18}}{{5 \times 24}} \cr & = 30\,{\text{km/hour}} \cr} $$This Question Belongs to Arithmetic Ability >> Speed Time And Distance
18/5
Super solved sir
How can 18/5dont understand me
i got it its formula.
why use 18/5?
Hello Varsha,
18/5 is use for converting meter/seconds into kilometer/hour. Actually its come from 3600/1000.
why theres 18/5 in first example?