A boy runs 200 metres in 36 seconds what is his speed

An athlete runs 200 meters race in 24 seconds. His speed (in km/hr) is : [A]28.5 [B]30 [C]24 [D]20

30 $latex Speed = \frac{Distance }{Time}=\frac{200}{24}m/s&s=1$ $latex =>\frac{200}{24}m/s=\frac{200}{24}\times \frac{18}{5}=30 km/hr&s=1$

Hence option [B] is the right answer.

A boy runs 200 metres in 24 seconds. What is his speed ?

    28 hours

    30 hours

    20 km/hr

    24 km/hr

Explanation: According to the given question, d = distance = 200 m t = time = 24 sec s = speed And we are asked to find speed in km/h. We know, speed = distance/time s = d/t Putting the values we get, s = 200/24 s = 8.33 m/s Now, to convert it into km/h, We know, 1 km = 1000 m 1 m = 1/1000 km Similarly, 1 sec = 1/3600 hr s = 8.33 m/s s = 8.33 ×3600 /1000 s = 29.98 km/h

Thus speed of the boy is 29.98 km/h or 30 hours

Next Question

If the speed of a man is 45 km per hour, then what is the distance traveled by him in 30 seconds ?

Hello Varsha,
18/5 is use for converting meter/seconds into kilometer/hour. Actually its come from 3600/1000.