Mr. Garrison has two dogs, Spot and Wolf. He enters them in a local dog race, which is 3,000 meters long. If Spot has an average speed of 400 meters per minute, and Wolf has an average speed of 300 meters per minute, how much longer does it take Wolf to run the race than Spot?

Question

anonymous · Answer

A 3 minutes
B 1 minutes
C 2.5 minutes

hoblos · Answer

we have to calculate first the time needed by each to run the race
the formula is
s=d/t
where  s  is the speed, d is the distance, t is the time

so    t= d/s

apply it to both of them and tell me what you get

anonymous · Answer

@SatansFate

anonymous · Answer

In this case you need the equation $$time = distance \div speed$$
For "Spot", $$time = 3000 \div 400 = 7.5 minutes.$$
For "Wolf", $$time = 3000 \div 300 = 10 minutes.$$
Difference between them is 2.5 minutes, so C is the correct answer.