[填空题]
Assume in Problem 50 that the qhax+h;najg,fs) u+( sp- *jjmfl/5 o4btl(1gkgs ucrm16xb)oeeder’s speed is not known. If the police car accelerates uniformly as given above, and overtakes the speederu*-1bc4m51jojkb/ sxg 6f) m (gt orll after 7.00 s, what was the speeder’s speed? km/h
