Question

Из двух городов , расстояние между которыми 98 км, одновременно навстречу друг другу вышли две машины. За час голубая машина прошла 42 км, а серая - 44 км. Сколько километров осталось проехать голубой машине до города Б? Найди ответ двумя способами?

Answer 1

1)98-42=56 км-осталось голубой машине

Answer 2

Problem Analysis

We have two cars traveling towards each other from two cities that are 98 km apart. The blue car has traveled 42 km in one hour, and the gray car has traveled 44 km in the same time. We need to determine how many kilometers the blue car has left to reach city B.

Solution 1: Using Relative Distance

To find the remaining distance for the blue car, we can calculate the relative distance between the two cars and subtract the distance traveled by the blue car.

The relative distance between the two cars is the sum of the distances traveled by both cars. In this case, the relative distance is 42 km + 44 km = 86 km.

To find the remaining distance for the blue car, we subtract the distance traveled by the blue car (42 km) from the relative distance (86 km):

Remaining distance for the blue car = Relative distance - Distance traveled by the blue car = 86 km - 42 km = 44 km.

Therefore, the blue car has 44 km left to reach city B.

Solution 2: Using Absolute Distance

Alternatively, we can calculate the absolute distance between the blue car and city B and subtract the distance traveled by the blue car.

The absolute distance between the blue car and city B is the total distance between the two cities (98 km) minus the distance traveled by the blue car (42 km):

Remaining distance for the blue car = Absolute distance - Distance traveled by the blue car = 98 km - 42 km = 56 km.

Therefore, the blue car has 56 km left to reach city B.

Conclusion

The blue car has either 44 km or 56 km left to reach city B, depending on whether we calculate the remaining distance using the relative distance or the absolute distance.