Answer: [tex]20.04\ \frac{mi}{h}[/tex]
Step-by-step explanation:
The first step is to convert the time to hours:
[tex]\frac{18\ min}{60}=0.3\ h[/tex]
[tex]\frac{27\ s}{3,600}=0.0075\ h[/tex]
Then, the record time of the Boston marathon is:
[tex]t=1\ h+0.3\ h+0.0075\ h\\\\t=1.3075\ h[/tex]
Knowing that the Boston marathon is 26.2 miles long, the average speed of record winner is:
[tex]average\ speed=\frac{26.2\ mi}{1.3075\ h}=20.04\ \frac{mi}{h}[/tex]
Answer:
0.005566 miles/sec
Step-by-step explanation:
We are given that The record for Boston marathon is 1 hour and 18 minutes and 27 seconds.
The Boston marathon is 26.2 miles long.
So, Time = 1 hour 18 minutes 27 seconds
1 hour = 3600 seconds
1 min = 60 seconds
So, 18 min = [tex]60 \times 18 = 1080 seconds[/tex]
So, Time =( 3600+1080+27)seconds=4707 seconds
Distance = 26.2 miles
Speed = [tex]\frac{Distance}{Time}[/tex]
Speed = [tex]\frac{26.2}{4707}[/tex]
Speed = [tex]0.005566 miles/sec[/tex]
Hence the average speed of record winner is 0.005566 miles/sec
