medals
Tom and Jerry enter a race. Tom runs an average of 10 kilometers per hour, and Jerry runs an average of 9 kilometers per hour. If Tom finishes one half hour before Jerry, how far do Tom and Jerry run?

20 km

90 km

45 km

22.5 km

Question

medals
Tom and Jerry enter a race. Tom runs an average of 10 kilometers per hour, and Jerry runs an average of 9 kilometers per hour. If Tom finishes one half hour before Jerry, how far do Tom and Jerry run?



20 km

90 km

45 km

22.5 km

perl · Answer

since they are both finishing a race, lets call the distance of the race d.
d = 10 (t-1/2)
d= 9*t

10(t-1/2)= 9t 
10t - 5 = 9t 
t = 5 . 
so d= 9*5 = 45
they both ran 45 kilometers

perl · Answer

unless i missed something, medals please :/

jack1 · Answer

puggles are awesome.. def medals

perl · Answer

hey thats a platypus, not a puggle

jack1 · Answer

o.0

not knowing what's in ur own pic... def worth subtracting medals

jack1 · Answer

-.- 
puggle: juvenile platypus or echidna