Question

Настя пробежала дистанцию за 3/5 мин,Коля - на 1/15 мин быстрее Насти,но на 1/30 мин медленнее Вити.За какое время пробежал дистанцию Витя?

Answer 1

$\frac{3}{5} - \frac{1}{15} = \frac{9}{15}- \frac{1}{15} = \frac{8}{15} ; \frac{8}{15} + \frac{1}{30} = \frac{16}{30} + \frac{1}{30}= \frac{17}{30}$


ответ семнадцать тридцатых время Вити   

Answer 2

Настя- 3.5 мин(210сек)
Коля-?, на 1.15 мин (75сек) быс⤴,на 1.30мин(90с)мед⤵
Витя-?
210+75=285с(4.75мин)проб Коля
285+90=375с(6.25мин)проб Витя

Answer 3

Calculating Running Times

To solve this problem, we need to calculate the running times for Nastya, Kolya, and Vitya based on the given information.

Let's start by defining the time Nastya took to run the distance as N minutes. According to the given information, Kolya ran the distance 1/15 minutes faster than Nastya, and Vitya ran the distance 1/30 minutes slower than Kolya.

Given: - Nastya's time: N minutes - Kolya's time: N - 1/15 minutes - Vitya's time: N - 1/15 + 1/30 minutes

Calculating Vitya's Running Time

To find Vitya's running time, we can substitute the value of Nastya's time (N) into the expression for Vitya's time.

Vitya's time = N - 1/15 + 1/30 minutes

Now, we can calculate the value of N based on the given information and then find Vitya's running time.

Let's proceed with the calculation.