Question

два велосипедиста одновременно и в одном направлении выехали из двух посёлков.расстояние между ними 30 км.скорость первого 12 км/ч,а второго на 2 км/ч больше.какое расстояние будет между ними через 2 ч после выезда?

Answer 1

(12*2+30)-14*2 = (24 + 30) - 14 * 2 = 54 - 28 = 26

Answer 2

Problem Analysis

We have two cyclists starting simultaneously from two different villages and moving in the same direction. The distance between them is 30 km. The first cyclist has a speed of 12 km/h, while the second cyclist has a speed that is 2 km/h faster than the first cyclist. We need to find the distance between them after 2 hours.

Solution

To find the distance between the two cyclists after 2 hours, we can use the formula:

Distance = Speed × Time

Let's calculate the distance traveled by each cyclist after 2 hours and then find the difference between their distances.

1. The first cyclist's speed is 12 km/h. So, the distance traveled by the first cyclist after 2 hours is: Distance1 = Speed1 × Time = 12 km/h × 2 h = 24 km.

2. The second cyclist's speed is 2 km/h faster than the first cyclist's speed, which is 12 km/h. So, the second cyclist's speed is 12 km/h + 2 km/h = 14 km/h. The distance traveled by the second cyclist after 2 hours is: Distance2 = Speed2 × Time = 14 km/h × 2 h = 28 km.

3. The difference between the distances traveled by the two cyclists is: Distance Difference = Distance2 - Distance1 = 28 km - 24 km = 4 km.

Therefore, the distance between the two cyclists after 2 hours will be 4 km.

Answer

The distance between the two cyclists after 2 hours will be 4 km.

Explanation

The first cyclist travels at a speed of 12 km/h and the second cyclist travels at a speed of 14 km/h. After 2 hours, the first cyclist will have traveled 24 km, while the second cyclist will have traveled 28 km. The difference between their distances is 4 km.