Question

СРОЧНО ПОЖАЛУЙСТА!!!!!!!!!! ДАМ ВСЕ СВОИ БАЛЫ!!!!!!!!!!!!!!!!!! Пароход, двигаясь против течения со скоростью 16 км/ч, проходит расстояние между двумя пристанями за 4 ч. За какое время он пройдёт то же расстояние по течению, если скорость парохода по течению равна 5,7 м/с? Ответ: время равно ч. (Результат округляй до десятых!)

Answer 1

Ответ:

S=V1*t1

S=(vp+vt)*t2

V1=vp-vt

Vt=vp-v1

v1*t1=(vp+vp-v1)*t2

v1*t1=(2*v-v1)*t2

t2=v1*t1/(2*vp+v1)

t2=16*4/(2*21+16)=64/58=1,1ч

Объяснение:

Answer 2

Problem Analysis

We are given the following information: - The speed of a steamship against the current is 16 km/h. - The steamship takes 4 hours to travel a certain distance between two piers. - The speed of the steamship with the current is 5.7 m/s.

We need to find the time it takes for the steamship to travel the same distance with the current.

Solution

To solve this problem, we can use the formula:

Time = Distance / Speed

Let's calculate the time it takes for the steamship to travel the same distance with the current.

Calculation

Given that the speed of the steamship against the current is 16 km/h, we can convert it to m/s by multiplying by 1000/3600:

Speed against the current = 16 km/h * (1000 m / 1 km) * (1 h / 3600 s) = 4.44 m/s

Now, we can use the formula to calculate the time it takes for the steamship to travel the same distance with the current:

Time = Distance / Speed

Let's assume the distance is D. The time it takes for the steamship to travel the distance against the current is 4 hours, so:

4 hours = D / 4.44 m/s

To find the time it takes for the steamship to travel the same distance with the current, we need to find the distance first. We can rearrange the equation to solve for D:

D = 4 hours * 4.44 m/s = 17.76 meters

Now, we can use the distance and the speed with the current to calculate the time:

Time = Distance / Speed = 17.76 meters / 5.7 m/s = 3.12 seconds

Therefore, it will take approximately 3.1 seconds for the steamship to travel the same distance with the current.

Answer

The steamship will take approximately 3.1 seconds to travel the same distance with the current.