Question

Задача: велосепидист ехал а часов со скоростью 12км/ч и 2ч со скоростью 8км/ч сколько км проехал велосипедист за это время? а равно;1;2;4?

Answer 1

12а+2•8=12а+16 а)Если а =1; то 12•1+16=12+16=28(км) проехал велосипедист. б)Если а=2;то 12•2+16=24+16=40(км) проехал велосипедист. в)Если а=4; то 12•4+16=48+16=64(км) проехал велосипедист. Ответ: велосипедист проехал : 28 км в первом случае, 40 км во втором случае, 64 км в третьем случае.

Answer 2

1)2*8=16(км) - проехал со скоростью 8 км\ч
2) При а = 1. 1*12=12;   При а = 2. 2*12=24;    При а = 4. 4*12=48(км) - ехал со скоростью 12 км\ч
3) При а = 1. 16+12=28(км) - весь путь.
3) При а = 2. 16+24=40(км) - весь путь.
3) При а = 4. 16+48=64(км) - весь путь.
Ответ: При а =1=28 км.         При а =2=40 км.          При а =4=64 км.

Answer 3

Problem:

The problem states that a cyclist traveled for one hour at a speed of 12 km/h and for two hours at a speed of 8 km/h. The question is how many kilometers did the cyclist travel during this time? The options provided are 1, 2, and 4.

Solution:

To find the total distance traveled by the cyclist, we need to calculate the distance traveled at each speed and then add them together.

Let's start by calculating the distance traveled at a speed of 12 km/h for one hour. The formula to calculate distance is:

Distance = Speed × Time

Substituting the values, we get:

Distance1 = 12 km/h × 1 hour = 12 km

Next, let's calculate the distance traveled at a speed of 8 km/h for two hours:

Distance2 = 8 km/h × 2 hours = 16 km

Finally, we add the two distances together to find the total distance traveled:

Total Distance = Distance1 + Distance2 = 12 km + 16 km = 28 km

Therefore, the cyclist traveled a total distance of 28 km during this time.

Answer:

The correct answer is 28 km.