某牧民饲养公羊和母羊共 140 只,一次共剪羊毛 160 斤。 若每只公羊平均剪毛 1 斤 2两,每只母羊平均剪毛 8 两,问公羊比母羊多多少只A.120...

作者: tihaiku 人气: - 评论: 0
问题 某牧民饲养公羊和母羊共 140 只,一次共剪羊毛 160 斤。 若每只公羊平均剪毛 1 斤 2两,每只母羊平均剪毛 8 两,问公羊比母羊多多少只
选项 A.120 B.100 C.80 D.75
答案 B
解析 设公羊有x只,则母羊有(140-x)只。根据题意有,1.2x+0.8(140-x)=160。解得x=120,则所求为120-(140-120)=100只。
更多 网友评论0 条评论)
暂无评论
错误啦!

错误信息

  • 消息: [程序异常] : MISCONF Redis is configured to save RDB snapshots, but it's currently unable to persist to disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
  • 文件: /twcms/kongphp/cache/cache_redis.class.php
  • 位置: 第 85 行
    <?php echo 'KongPHP, Road to Jane.'; ?>