Question

Незнайка стал догонять Шпунтика когда расстояние между ними было равно 1 км 80 м. Незнайка бежал со скоростью 170 м/мин,А шпунтик шел со скоростью 80 м/мин.Через сколько минут Незнайка догонит шпунтика? Помогите пожалуйсто сделать по действиям с объяснением. Заранее спасибо.

Answer 1

1 км=1 000 м ⇒ 1 км 80 м=1 080 м



1) 170-80=90 (м/мин.) - разность скоростей Незнайки и Шпутника.

2) 1 080:90=12 (мин.)

Ответ: через 12 минут Незнайка догонит Шпунтика.

Answer 2

Problem Analysis

To solve this problem, we need to determine the time it takes for Nезнайка to catch up to Шпунтик. We are given the initial distance between them, the speed at which Nезнайка is running, and the speed at which Шпунтик is walking.

Solution Steps

1. Convert the given distance from kilometers and meters to meters. 2. Calculate the relative speed between Nезнайка and Шпунтик. 3. Use the formula `time = distance / speed` to calculate the time it takes for Nезнайка to catch up to Шпунтик.

Solution

1. Convert the given distance from kilometers and meters to meters: - The given distance is 1 kilometer and 80 meters. - 1 kilometer is equal to 1000 meters. - Therefore, the total distance is 1000 meters + 80 meters = 1080 meters.

2. Calculate the relative speed between Nезнайка and Шпунтик: - Nезнайка's speed is given as 170 meters per minute. - Шпунтик's speed is given as 80 meters per minute. - The relative speed between Nезнайка and Шпунтик is the difference between their speeds: 170 m/min - 80 m/min = 90 m/min.

3. Use the formula `time = distance / speed` to calculate the time it takes for Nезнайка to catch up to Шпунтик: - Time = 1080 meters / 90 meters per minute = 12 minutes.

Therefore, Nезнайка will catch up to Шпунтик in 12 minutes.

Answer

Nезнайка will catch up to Шпунтик in 12 minutes.

Please let me know if I can help you with anything else.