From 7:45 p.m. to 9:30 p.m., Jim drove a distance of 84 km at a constant speed. What was this speed, in km/h?
(A) 60 (B) 80 (C) 112 (D) 63 (E) 48
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Source: CEMC, University of Waterloo,
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Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.