Question

Через міст проїхало 40 легкових автомобілів і велосипедів. Усього мостом проїхало 100 коліс. Скільки автомобілів і скільки велосипедів проїхало мостом?

Answer 1

1) 40:4=10 (авт.);
2) 40-10=30 (вел.)
Відповідь: 10 автомобілів і 30 велосипедів.

Answer 2

Calculating the Number of Cars and Bicycles

To solve this problem, we can use a system of equations. Let's denote the number of cars as C and the number of bicycles as B. We are given two pieces of information: 1. 40 cars and bicycles have passed, which can be represented as: C + B = 40 2. A total of 100 wheels have passed, which can be represented as: 4C + 2B = 100

Solving the System of Equations

We can solve the system of equations to find the values of C and B.

First, let's express C in terms of B from the first equation: C = 40 - B

Substitute this expression for C into the second equation: 4(40 - B) + 2B = 100

Solving for B: 160 - 4B + 2B = 100 160 - 2B = 100 -2B = -60 B = 30

Now that we have the value of B, we can find the value of C: C = 40 - 30 C = 10

Conclusion

Therefore, 10 cars and 30 bicycles passed over the bridge.