Question

За день туристи подолали 31км. Чотири години вони рухалися зі швидкістю 4км/год, а потім - зі швидкістю 5км/год. Скільки всього годин були у дорозі туристи?

Answer 1

1) 4*4=16 км - они прошли за первые 4 часа; 2)31-16=15 км - им осталось пройти; 3)15:5=3 ч; 4)4+3=7 ч - они были в пути.

Answer 2

Calculation of Total Time Spent by Tourists

To calculate the total time spent by the tourists on their journey, we need to consider the distance covered and the speeds at which they traveled.

The tourists covered a total distance of 31 km. For the first four hours, they traveled at a speed of 4 km/h, and then they increased their speed to 5 km/h.

To calculate the time spent at each speed, we can use the formula:

Time = Distance / Speed

Let's calculate the time spent at each speed and then add them together to find the total time spent by the tourists.

1. Time spent at a speed of 4 km/h: - Distance: 31 km - Speed: 4 km/h - Time = 31 km / 4 km/h = 7.75 hours

2. Time spent at a speed of 5 km/h: - Distance: 31 km - Speed: 5 km/h - Time = 31 km / 5 km/h = 6.2 hours

Now, let's add the time spent at each speed to find the total time spent by the tourists:

Total time = Time spent at 4 km/h + Time spent at 5 km/h = 7.75 hours + 6.2 hours = 13.95 hours

Therefore, the tourists spent a total of approximately 13.95 hours on their journey.