甲乙两个水管单独开,注满一池水,分别需要20小时,16小时.丙水管单独开,排一池水要10小时,若水池没水,同时打开甲乙两水管,5小时后,再打开排水管丙,问水池注满还是要多少小时?1p+s-U
解:1p+s-U
算式:提示8P0r6q7l+L0i-M,Y;Z1p+s-U
答:还要8E:Z6T:^5O2Z小时就能将水池注满。1p+s-U