Question 782563
a very fast man can run 100 yards in 10 seconds, round to the nearest mile per hour
:
That's a speed of 100/10 = 10 yds per second
:
There's 1760 yds in 1 mi, 3600 secs in 1 hr
:
{{{(3600*10)/1760}}} = 20.45 mph ~ 20 mph