Question 167798
BY ratio and proportion,
{{{(3 mph)/(2 sec)=(x mph)/(11 sec)}}}
x=3(11)/2=33/2

So after 11 sec, his speed will be

45+33/2=45+16.5=61.5 miles per hour


Power up,
HyperBrain!

Stop this mess! Click <a href="http://uselessplastic.wordpress.com">here</a>