Q. An athlete runs 200 meters race in 24 seconds. His speed (in km/hr) is :
Answer: 30
Notes: $latex Speed = \frac{Distance }{Time}=\frac{200}{24}m/s&s=1$ $latex =>\frac{200}{24}m/s=\frac{200}{24}\times \frac{18}{5}=30 km/hr&s=1$ Hence option [B] is the right answer.

1