Question

Время движения подводной лодки на поверхности воды в 20 раз меньше,чем время движения под водой. сколько времени подводная лодка находилась под водой,если это время на 57 часов больше, чем время движения на поверхности воды.

Answer 1

Х ч - время движения лодки на поверхности

20Х ч - время движения подводой

Х+57 ч - время движения подводой

20Х=Х+57

20Х-Х=57

19Х=57

Х=57:19

Х=3 ч на поверхности воды

3х20=60 ч под водой или

3+57=60ч

Answer 2

Решаем системой уровнений:

20х=у,      20х=57+х,  20х-х=57,    19х=57,  х=3,        х=3,

у-х=57;     у=57+х;      у=57+х;       у=57+х;  у=57+3;   у=60.

Ответ: подводная лодка находилась под водой 60ч, а на поверхности-3ч.

 

Answer 3

Calculation of Submerged Time of a Submarine

To calculate the time a submarine spends submerged, we need to consider the given information that the time spent underwater is 20 times longer than the time spent on the surface. Additionally, it is mentioned that the submarine's total time underwater is 57 hours longer than the time spent on the surface.

Let's denote the time spent on the surface as x hours. According to the given information, the time spent underwater is 20 times longer, so the time spent underwater can be represented as 20x hours.

The total time underwater is 57 hours longer than the time spent on the surface, so we can set up the following equation:

20x = x + 57

To solve for x, we can simplify the equation:

20x - x = 57

19x = 57

Dividing both sides of the equation by 19, we find:

x = 3

Therefore, the time spent on the surface is 3 hours.

To find the time spent underwater, we can substitute this value back into the equation:

20x = 20 * 3 = 60

Therefore, the submarine spends 60 hours underwater.

Please note that the sources provided did not directly answer the question. The calculation was performed based on the given information.