Question

when ran 4.8 km in 7200 seconds. find the speed​

Answer 1

Answer:

0.5 m/s or 2.4 km/h

Step-by-step explanation:

distance = 4.8 km = 4800 m

time = 7200 s = 2 h

speed = distance/time            

           = 4800m/7200s       =  4.8km/2h

           = (1/2)m/s                  =  2.4 km/h

           = 0.5 m/s

Therefore, speed = 0.5 m/s or 2.4 km/h

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Answer 2

Answer:

A person ran by the speed is $0.67$ m/s or $2.4$ km/h.

Step-by-step explanation:

$1$ second = $\frac{1}{60}$ minutes

               = $\frac{1}{60 \times 60}$ hour

Recall the definition of speed,

Speed is termed as the total distance travelled in an particular time interval, i.e.,

$s=\frac{d}{t}$,

where $s=$speed, $d=$ total distance travelled and $t=$ time taken

According to the question,

A person ran a distance of $4.8$ km in $7200$ seconds, i.e.,

Total distance travelled = $4.8$ km

Total time taken by him = $7200$ seconds

                         (in hour) = $7200\times\frac{1}{60\times 60}$ hours

                                        = $\frac{72}{6\times 6}$ hours

                                        = $2$ hours

Now,

Speed = $\frac{Total\ distance\ travelled}{Total \ time\ taken}$

           = $\frac{4.8}{2}$

           = $2.4$ km/h

(in m/s) = $2.4\times\frac{5}{18}$

            = $0.67$ m/s (Approx.)

Therefore, the speed is $0.67$ m/s or $2.4$ km/h.

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