Who's up for two difficult math questions??

OtherWindow
Tue, 23 Nov 2010 16:56:22 +0000

Second one:
The car traveled 10 miles at 20mph.
s = d/t
20 = 10/t
t was 1/2 hour

So 1/2 hour at 20mph.

s=d/t
40 = 10/t
t = 1/4 hour.

So 1/4 hour at 40 mph.

You could use the weighted average type thing or…

Total distance/total time = average speed

20 miles / 3/4 hour

= 26.7 mph