问题标题:
【一条有关RATE的数学题,(a)Bob,byhimself,canpaintfourroomsin10hours.IfhehiresPetertohelp,theycandothesamejobtogetherin6hours.IfheletsPeterworkalone,howlongwillittakeforPetertopaintthefourrooms?(b)Inpart(a)】
问题描述:
一条有关RATE的数学题,
(a)Bob,byhimself,canpaintfourroomsin10hours.IfhehiresPetertohelp,theycandothesamejobtogetherin6hours.IfheletsPeterworkalone,howlongwillittakeforPetertopaintthefourrooms?
(b)Inpart(a),ifBobworksalonefor4hours,andthentheyworktogethertocompletetheremainingjob,thenhowlongwillittakethemtofinishtheremainingjob?
槐瑞托回答:
(a):itwilltake15hourforpetertopaintthefourroom.
(b):itwilltake3.6hourforthemtofinishtheramainingjob.
查看更多
八字精批
八字合婚
八字起名
八字财运
2024运势
测终身运
姓名详批
结婚吉日