posted by Iris on .
A marathon runner runs 3km in direction 0degree and them 4km in direction 90degree. total time for the race is 2 hours.so determine the total distance covered?
this is a 3, 4 , 5 right triangle
5^2 = 3^2 + 4^2
25 = 9 + 16
time has nothing to do with the problem