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)
$$\eqalign{ & {\text{Speed of athlete}}, \cr & = \frac{{200\,{\text{m}}}}{{24\,{\text{secs}}}} \cr & = \frac{{200 \times 18}}{{5 \times 24}} \cr & = 30\,{\text{km/hour}} \cr} $$Join The Discussion
Comments ( 7 )
Related Questions on Speed Time and Distance
A. 48 min.
B. 60 min.
C. 42 min.
D. 62 min.
E. 66 min.
A. 262.4 km
B. 260 km
C. 283.33 km
D. 275 km
E. None of these
A. 4 hours
B. 4 hours 30 min.
C. 4 hours 45 min.
D. 5 hours
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?