[讨论]这道prep题不知道哪个是正确答案

90.   10132-!-item-!-187;#058&007125

A circular jogging track forms the edge of a circular lake that has a diameter of 2 miles.  Johanna walked once around the track at the average rate of 3 miles per hour.  If t represents the number of hours it took Johanna to walk completely around the lake, which of the following is a correct statement?

(A) 0.5 < t < 0.75

(B) 1.75 < t < 2.0

(C) 2.0 < t < 2.5

(D) 2.5 < t < 3.0

(E) 3 < t < 3.5

the least circuference of the jogging track is greater than the circumference of the lake.

the Cir`of the lake is= 2*3.14=6.28

so t>6.28/3=2.09

so the most probabel answer is C.