A.80
B.90
C.100
D.120
[单选题]现有浓度为20%的糖水300克,要把它变为浓度为40%的糖水,需要加糖多少克?( )A.80B.90C.100D.120
[单选题]现有浓度为20%的糖水300克,要把它变为浓度为40%的糖水,需要加糖多少克?( )A.80B.90C.100D.120
[单选题]现有浓度为20%的糖水300克,要把它变为浓度为40%的糖水,需要加糖多少克?( )A.80B.90C.100D.120
[单选题]现有浓度为20%的糖水300克,要把它变为浓度为40%的糖水,需要加糖多少克?( )A.80B.90C.100D.120
[单选题]现有浓度为20%的糖水300克,要把它变为浓度为40%的糖水,需要加糖多少克?( )A.80B.90C.100D.120
[单选题]在浓度为40%的糖水中加入5千克水,使浓度变为30%。现在要使糖水浓度变为50%,需要再加( )千克糖。A.8B.6C.14D.12
[单选题]在浓度为40%的糖水中加入5千克水,使浓度变为30%。现在要使糖水浓度变为50%,需要再加( )千克糖。A.8B.6C.14D.12
[单选题]在浓度为40%的糖水中加入5千克水,使浓度变为30%。现在要使糖水浓度变为50%,需要再加( )千克糖。A.8B.6C.14D.12
[单选题]在浓度为40%的糖水中加入5千克水,使浓度变为30%。现在要使糖水浓度变为50%,需要再加( )千克糖。A.8B.6C.14D.12
[单选题]在浓度为40%的糖水中加入5千克水,使浓度变为30%。现在要使糖水浓度变为50%,需要再加( )千克糖。A.8B.6C.14D.12