“五一”假期期间，某学校计划组织385名师生租车旅游，现知道租车公司有42座和60座两种客车，42座客车的租金每辆为320元，60座客车的租金每辆为460元．
(1)若学校只租用42座客车或者只租用60座客车，那么学校各需多少租金?
(2)若学校同时租用这两种客车共8辆(可以坐不满)，而且要比单独只租用一种车辆节省租金．请你帮助该学校选择一种最节省的租车方案．
正确答案及解析
正确答案
解析
解：(1)385÷42≈9．2，所以单独租用42座客车需10辆，租金为320×10=3200(元)．385÷60≈6．4，所以单独租用60座客车需7辆，租金为460×7=3220(元)．
(2)设租用42座客车x辆，则60座客车(8-x)辆，由题意得，
解得3．4≤x≤5．3．
由于x取整数，所以x=4或5．
当x=4时，租金为320×4+460×(8-4)=3120(元)；
当x=5时，租金为320×5+460×(8-5)=2980(元)．
故租用42座客车5辆，60座客车3辆，租金最少．
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