<PRE><B>Question 267440</B>
Going an average of 65 mph, Bob can travel 500 miles per day.
 How far can he travel in a day if he increases his average speed to 75 mph?
 Show (explain) how you can calculate your answer without calculating the time Bob spent on the road
:
Use a ratio equation, d = dist at 75
{{{65/75}}} = {{{500/d}}}
Cross multiply
65d = 75 * 500
65d = 37500
d = {{{37500/65}}}
d = 576.92 mi in a day</PRE>