Question

Костя провел под водой 900 мин.Половину всего этого времени он рассматривал камбалу. одну пятую часть всего времени гнался за стаей скумбрий.а остальное время наблюдал за черноморской акулой Сколько времени наблюдал за акулой?Найти решение

Answer 1

450 +180= 630 . 900- 630= 270

Answer 2

900 / 2 = 450мин  рассматривал камбалу
900 / 5 = 180 мин гнался за скумбрией
450 + 180 = 630 мин рассматривал и гнался вместе
900 - 630 = 270мин наблюдал за акулой
Ответ 270 мин

Answer 3

Problem Analysis

To solve this problem, we need to determine how much time Kostya spent observing the Black Sea shark. We are given that Kostya spent a total of 900 minutes underwater, with half of that time spent observing flounder and one-fifth of the total time spent chasing a shoal of mackerel. We need to find the remaining time spent observing the shark.

Solution

Let's break down the information given: - Total time spent underwater: 900 minutes - Time spent observing flounder: half of the total time = 900/2 = 450 minutes - Time spent chasing a shoal of mackerel: one-fifth of the total time = 900/5 = 180 minutes

To find the remaining time spent observing the shark, we subtract the time spent observing flounder and chasing mackerel from the total time spent underwater: 900 - 450 - 180 = 270 minutes

Therefore, Kostya spent 270 minutes observing the Black Sea shark.

Answer

Kostya spent 270 minutes observing the Black Sea shark.