The last question is: Fangfang and Yuanyuan are fighting for typing. Fangfang calls 350 in 3 minutes and 583 in 5 minutes. Whose typing speed is fast? Why?
Fangfang model 350/3 = 1 16.666666 ... words per minute, which originated from typing 583/5= 1 16.6 words per minute.
Fangfangkuai