Question

Томми отправился на велосипеде в соседний город,до 18 км,за саженцами и собрался потратить на дорогу туда и обратно 4 часа,но в пути он смог проезжать в час на 3км больше,чем собирался.На сколько часов меньше потратил Томми на дорогу, чем собирался.

Answer 1

18 + 18 = 36 км проехал Томми до города и обратно.

36 : 4 = 9 км/ч скорость с которой он хотел ехать

9 + 3 = 12 км/ч скорость с которой он ехал

36 : 12 = 3 ч затратил Томми на дорогу

4 - 3 = 1 ч меньше затратил он на дорогу, чем планировал.

Ответ. 1 ч. 

Answer 2

18*2=36 км на весь путь туда и обратно

36/4=9км/ч- планировал ехать с такой скоростью

9+3=12 км/ч- скорость с которой ехал

36/12=3часа потратил

4-3=1час

ответ на 1 час

 

Answer 3

Problem Analysis

Tommy is traveling on a bicycle to a neighboring city, which is 18 km away. He planned to spend a total of 4 hours on the round trip. However, during the journey, he was able to ride 3 km per hour faster than he had initially planned. We need to determine how many hours less Tommy spent on the trip than he had originally planned.

Solution

Let's start by calculating the time it would have taken Tommy to complete the round trip at his planned speed.

The distance from Tommy's starting point to the neighboring city is 18 km. Since he planned to spend 4 hours on the round trip, his planned speed can be calculated as:

Planned speed = Total distance / Total time = 18 km / 4 hours = 4.5 km/h

Now, let's calculate the time it actually took Tommy to complete the round trip at the faster speed.

Tommy's actual speed is 3 km/h faster than his planned speed. Therefore, his actual speed can be calculated as:

Actual speed = Planned speed + 3 km/h = 4.5 km/h + 3 km/h = 7.5 km/h

To calculate the time Tommy spent on the round trip at the actual speed, we can use the formula:

Time = Distance / Speed

The time for the outbound trip is the same as the time for the return trip, so we can calculate the time for one leg of the trip and then double it.

Time for one leg = Distance / Speed = 18 km / 7.5 km/h = 2.4 hours

Since Tommy spent the same amount of time on the return trip, the total time for the round trip at the actual speed is:

Total time = 2 * Time for one leg = 2 * 2.4 hours = 4.8 hours

To find out how many hours less Tommy spent on the trip than he had originally planned, we subtract the total time at the actual speed from the planned time:

Difference in time = Planned time - Actual time = 4 hours - 4.8 hours = -0.8 hours

Therefore, Tommy spent 0.8 hours less on the trip than he had originally planned.

Answer

Tommy spent 0.8 hours less on the trip than he had originally planned.