Question

Счетчик автомобиля показывал 12921 км. Через 2 часа счетчик показывал число,которое читалось одинаково в обоих направлениях. С какой скоростью ехал автомобиль?

Answer 1

Ближайшее показание счетчика будет : 13031 , то есть за два часа автомобиль проехал : 13031 - 12921 = 110 км . Его скорость нравна : 110 / 2 = 55 км/ч

Answer 2

Problem Analysis

We are given that the car's odometer showed a reading of 12,921 km. After 2 hours, the odometer showed a number that read the same in both directions. We need to determine the speed at which the car was traveling.

Solution

To find the speed of the car, we need to calculate the distance traveled in 2 hours. Since the number on the odometer reads the same in both directions, it is likely a palindrome.

Let's break down the problem step by step:

1. The odometer reading is 12,921 km. 2. After 2 hours, the odometer reading is a palindrome. 3. We need to find the speed at which the car was traveling.

To solve this problem, we can follow these steps:

1. Determine the palindrome number that the odometer reading represents after 2 hours. 2. Calculate the distance traveled by subtracting the initial odometer reading from the palindrome number. 3. Divide the distance traveled by 2 hours to find the speed of the car.

Let's calculate the palindrome number first.

Calculating the Palindrome Number

To find the palindrome number, we need to consider the structure of the given number. From the search results, we can see that the number 12,921 is a palindrome when read in both directions. Therefore, the palindrome number after 2 hours is 12,921.

Calculating the Distance Traveled

To calculate the distance traveled, we subtract the initial odometer reading from the palindrome number:

12,921 km - 12,921 km = 0 km

The distance traveled is 0 km.

Calculating the Speed

To calculate the speed, we divide the distance traveled by the time taken:

Speed = Distance / Time = 0 km / 2 hours = 0 km/h

Therefore, the car was traveling at a speed of 0 km/h.

Conclusion

The car was traveling at a speed of 0 km/h.