Problema Solution
The amount of time it takes a swimmer to swim a race is inversely proportional to the average speed of the swimmer. A swimmer finishes a race in 30 seconds with an average speed of feet per second. Find the average speed of the swimmer if it takes 25 seconds to finish the race.
Answer provided by our tutors
aasume t = k/v where t is time, v is average speed and k is constant.
from give info.
30 = k/1
== > k = 30 feet
so, t = 30/v
now for t = 25 ,average spped, v = 30/25 = 6/5 = 1.2 feet per second