The circumference of a rectangle is 88cm, and the ratio of length to width is 7 to 4. How many centimeters are the length and width of the rectangle? How many square centimeters is the area? In order to support the drought stricken areas in Southwest China, the school carried out the theme activity of "love for drought stricken areas". The students collected waste mineral water bottles and donated the money to the disaster area. The students of class 62 were divided into three groups to collect mineral water bottles. The ratio of the number of bottles collected by the first group and the second group was 4:3, The ratio of the number of bottles collected by the second group and the third group is 6:5. What is the ratio of the number of bottles collected by the three groups?

The circumference of a rectangle is 88cm, and the ratio of length to width is 7 to 4. How many centimeters are the length and width of the rectangle? How many square centimeters is the area? In order to support the drought stricken areas in Southwest China, the school carried out the theme activity of "love for drought stricken areas". The students collected waste mineral water bottles and donated the money to the disaster area. The students of class 62 were divided into three groups to collect mineral water bottles. The ratio of the number of bottles collected by the first group and the second group was 4:3, The ratio of the number of bottles collected by the second group and the third group is 6:5. What is the ratio of the number of bottles collected by the three groups?

1： 88 / 2 = 44 (CM) is the sum of the length and width of a rectangle, 44 / (7 + 4) is the proportion, 7 * 4 is the length and 4 * 4 is the width of the rectangle, 28 * 16 is the area of the rectangle. Second, the second group in the first proportion accounts for 3, the second group accounts for 6, and 6 / 3 is 2. Then the first group accounts for 8, and the ratio of the three groups is 8:6:5

Sixth grade math problem, please tell the process
The number of boys in a school is 9 / 7 of the number of girls. The ratio of boys to the number of the whole school is () the ratio of girls to the number of the whole school is () how many times more boys than girls, and how many times less girls than boys

The number of boys in a school is 9 / 7 of the number of girls, that is to say, the number of boys is 9 / 7 of the number of girls
That is, there are 9 boys and 7 girls in every 16 students
So the ratio of boys to the whole school is 9:16; the ratio of girls to the whole school is 7:16; the number of boys is 2 / 7 more than girls, and the number of girls is 2 / 9 less than boys

Sequence 2,4,7,11,16,22, -- what is the 33rd term?
fast

562