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Today's answers after 1:40 are not used 1. The ratio of adult weight to blood weight is about 13:1. Congcong's father weighs 78kg. How many kg of blood does he have? 2. There are 240 literature and art books in the school library. The number of science and technology books is 5 / 6 of literature and art books and 2 / 3 of story books. How many story books are there? 3. The TV factory actually produced 4500 TV sets in March, one eighth more than the original plan. How many TV sets will the original plan produce? 4. The two cars drive from the two places at the same time, and meet three hours later. The speed ratio of a and B is 5:4, and the distance between the two places is 270 km. Find out the speed of the two cars Four meters is one third more than () The ratio of male workers to female workers in a factory is 5:3. There are 20 more male workers than female workers and () more male workers
1. The ratio of adult weight to blood weight is about 13:1. Congcong's father weighs 78kg. How many kg of blood does he have?
Blood 78 / 13 = 6 kg
2. There are 240 literature and art books in the school library. The number of science and technology books is 5 / 6 of literature and art books and 2 / 3 of story books. How many story books are there?
There are 240 science and technology books (5 / 6) = 200
There are 200 story books (2 / 3) = 300
Comprehensive 240 × (5 / 6) / (2 / 3) = 300 copies
3. The TV factory actually produced 4500 TV sets in March, one eighth more than the original plan. How many TV sets will the original plan produce?
The original plan is to produce 4500 / (1 + 1 / 8) = 4500 / (9 / 8) = 4000 sets
4. The two cars drive from the two places at the same time, and meet three hours later. The speed ratio of a and B is 5:4, and the distance between the two places is 270 km. Find out the speed of the two cars
Speed sum = 270 / 3 = 90 km / h
Speed of a = 90 × 5 / (4 + 5) = 50 km / h
Speed of B = 90-50 = 40 km / h
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