The boat passed 66.15 km against the current in 4.9 hours. how long it will take for him to return
| August 8, 2021 | education
The boat passed 66.15 km against the current in 4.9 hours. how long it will take for him to return, if his own speed is 16.2 km / h.
We find the speed of the boat against the stream of the river.
Divide the distance covered by the travel time.
66.15 / 4.9 = 13.5 km / h.
We find the speed of the river.
To do this, we subtract the speed of the boat along the course of the river from our own speed.
Will be:
16.2 – 13.5 = 2.7 km / h.
We find the speed of the boat along the river.
16.2 + 2.7 = 18.9 km / h.
Let’s determine the time it takes for the boat to travel back.
Divide 66.15 km by the speed of the boat downstream.
66.15 / 18.9 = 3.5 hours.
Answer:
The boat will go back in 3.5 hours.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
