Posted by Avery on Thursday, October 4, 2012 at 12:57am.
Two cars, 127 miles apart, start moving towards each other at the same time. One is moving 3 times as fast as the other. If they meet 1.5 hrs later, find the average speed of the slower car in miles per hour?

Physics/Math  Steve, Thursday, October 4, 2012 at 10:17am
slower car moves 127/4 miles in 1.5 hrs
(127/4 mi) / 1.5hr = 21.17 mi/hr

Physics/Math  Avery, Thursday, October 4, 2012 at 11:57am
Sorry, how did you get that? :(

Physics/Math  Elena, Thursday, October 4, 2012 at 4:56pm
v1•t+v2•t=s
v1=v, v2=3v,
v•t+3v•t=4•v•t=s
v=s/4•t =127/4•1.5 =21.17 mph

Physics/Math  Avery, Thursday, October 4, 2012 at 7:06pm
Oh! I understand now, thanks so much to both :)
Answer This Question
Related Questions
 math  Two cars 288 km apart start at the same time moving towards each other ...
 Stupid Math School Math  Two cars are 750 miles apart and start moving towards ...
 Math  Two cars are 400 miles apart and start towards one another, one car ...
 math  2.Two cars leave Kansas City at the same time. One car is moving east and...
 college algebra  Two cyclists, 64 miles apart, start riding toward each other ...
 math  Two cars leave Kansas City at the same time. One car is moving east and ...
 Algebra  Two cyclists, 128 miles apart, start riding toward each other at the ...
 big lake  Two cyclists, 36 miles apart, start riding toward each other at the ...
 math  Two cars leave at the same time from towns that are 460 miles apart and ...
 Physics  Two cars are initially 10.5 km apart on a straight road. If the cars ...
More Related Questions