Question

An athlete runs 200 metres race in 24 seconds. what is his speed in km/h

Answer 1

Answer:(29.85km/h)

Explanation:

1000m=1km

200m=x [x=(200m/1000m)x1km]

x=0.2km

3600second= 1 hour

24 seconds =b [b=(24s/3600s)x1 hour ]

b=0.0067(in 2 decimal place)

velocity in km/h will be

0.2km/0,0067secs

=29.85(in 2 decimal place)

Answer 2

speed = 30 km/h

Explanation:

We are told that a 200 metres race is run by an athlete in 24 seconds. The question then asks us to calculate the athlete's speed in km/h.

To do this, let's first convert the given data into the required units:

• Converting from metres to kilometres:
To convert from 200 metres to kilometres, we have to divide it by 1000:

200 m = 200 m ÷ 1000 m/km

= 0.2 km

• Converting from seconds to hours:
To convert 24 seconds to hours, we have to divide it by 3600:

24 s = 24 s ÷ 3600 s/h

=
`(24)/(3600)` h

Now that we have the data in the appropriate units, we can use the following formula to calculate speed:

`\boxed{\mathrm{speed = (distance)/(time)}}`

⇒ speed =
`\mathrm{(0.2 \ km)/(24/3600 \ h)}`

⇒ speed = 30 km/h

Therefore, the speed of the athlete is 30 km/h.