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.
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《【一条有关RATE的数学题,(a)Bob,byhimself,canpaintfourroomsin10hours.IfhehiresPetertohelp,theycandothesamejobtogetherin6hours.IfheletsPeterworkalone,howlongwillittakeforPetertopaintthefourrooms?(b)Inpart(a)】|高中数学问答-字典翻译问答网》
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