Smith and Jones comprise a two-person economy. Their hourly rates of production are shown below.Suppose Smith and Jones begin by producing 0 computers and 220 calculators per hour. If they wish to produce 2 computers and 200 calculators per hour efficiently, then Smith should spend _, and Jones should spend _.
A.12 minutes on computers and 48 minutes on calculators; 1 hour on calculators
B.1 hour on calculators; 10 minutes on computers and 50 minutes on calculators
C.48 minutes on computers and 12 minutes on calculators; 1 hour on calculators
D.30 minutes on each; 30 minutes on each
正确答案:12 minutes on computers and 48 minutes on calculators; 1 hour on calculators