题目内容
(本小题满分10分)
某工厂计划为震区生产两种型号的学生桌椅500套,以解决1250名学生的学习问题,一套型桌椅(一桌两椅)需木料,一套型桌椅(一桌三椅)需木料,工厂现有库存木料.
1.(1)有多少种生产方案?
2.(2)现要把生产的全部桌椅运往震区,已知每套型桌椅的生产成本为100元,运费2元;每套型桌椅的生产成本为120元,运费4元,求总费用(元)与生产型桌椅(套)之间的关系式,并确定总费用最少的方案和最少的总费用.(总费用生产成本运费)
3.(3)按(2)的方案计算,有没有剩余木料?如果有,请直接写出用剩余木料再生产以上两种型号的桌椅,最多还可以为多少名学生提供桌椅;如果没有,请说明理由.
1.解:(1)设生产型桌椅套,则生产型桌椅套,由题意得
················································································ (2分)
解得······························································································· (3分)
因为是整数,所以有11种生产方案.·································································· (4分)
2.(2)······························ (6分)
,随的增大而减少.
当时,有最小值.·············································································· (7分)
当生产型桌椅250套、型桌椅250套时,总费用最少.
此时(元)
3.(3)有剩余木料,最多还可以解决8名同学的桌椅问题
【解析】略