According to the title, the time from home to the library is 20 minutes, so as long as you know how far Xiaoqing walks every minute, you can calculate the distance.

It is known that the diameter of the wheel is 100 cm, so the circumference of the wheel is:100 x 3.14 = 314 (cm), that is, the length of one circle of the wheel is 314 cm;

It is also known that the wheel rotates 100 cycles per minute, so the riding distance of the wheel per minute is 314x100 = 31400 (cm) = 314 (m).

Xiaoqing needs 20 minutes from home to the library, so 3 14x20=6280 (meters).

A: Xiaoqing's distance from home to the library is 6280 meters.