An athlete ran from point A in the direction of the arrow on a circular track divided into five equal-length sections at a constant high speed and reached point B in 60 seconds. Then this athlete ran from point B in the direction of the arrow at a constant low speed for 320 seconds. Accordingly, what is the difference between the time it takes this athlete to run the entire track at low speed and the time it takes to run the entire track at high speed in seconds? A) 80 B) 90 C) 100 D) 110 E) 120
An athlete ran from point A in the direction of the arrow on a circular track divided into five equal-length sections at a constant high speed and reached point B in 60 seconds. Then this athlete ran from point B in the direction of the arrow at a constant low speed for 320 seconds.
Accordingly, what is the difference between the time it takes this athlete to run the entire track at low speed and the time it takes to run the entire track at high speed in seconds?
A) 80
B) 90
C) 100
D) 110
E) 120