There are three classes in grade six. Class one accounts for 25% of the total number of the three classes. The ratio of class two to class three is 7:8, and class one is 24 less than class three There are three classes in grade six. Class one accounts for 25% of the total number of the three classes. The ratio of class two to class three is 7:8, and class one is 24 less than class three. How many students are there in grade six? It takes six hours for the express train to go from station a to station B, and 10 hours for the local train to go from station B to station a. the two trains are facing each other at the same time. When they meet, the express train runs 225km, and how many kilometers are there between the two stations?

There are three classes in grade six. Class one accounts for 25% of the total number of the three classes. The ratio of class two to class three is 7:8, and class one is 24 less than class three There are three classes in grade six. Class one accounts for 25% of the total number of the three classes. The ratio of class two to class three is 7:8, and class one is 24 less than class three. How many students are there in grade six? It takes six hours for the express train to go from station a to station B, and 10 hours for the local train to go from station B to station a. the two trains are facing each other at the same time. When they meet, the express train runs 225km, and how many kilometers are there between the two stations?

Hello!
one
The proportion of three classes in the total number of people:
8/7+8×(1-25%)
=8/15×3/4
=2/5
24÷(2/5-25%)
=24÷3/20
=160 (people)
A: there are 160 students in grade six
two
1÷(1/6+1/10)
=1÷4/15
=15 / 4 (hours)
225÷(1/6×15/4)
=225÷5/8
=360 (km)
A: the two stations are 360 kilometers apart
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