From two piers located at a distance of 560 km from each other, a barge and a boat sailed towards each

From two piers located at a distance of 560 km from each other, a barge and a boat sailed towards each other at the same time. How many hours later did they meet if the speed of the barge is 25 km per hour and the speed of the boat is 45 km per hour?

Let’s solve this task in steps with a detailed explanation of each of them.
1) 25 + 45 = 70 kilometers per hour – the speed of convergence of the barge and the boat, as they move towards each other at speeds of 25 kilometers per hour and 45 kilometers per hour, respectively;
2) 560: 70 = 8 hours – after this time the barge and the boat will meet, since their approach speed is 70 kilometers per hour, and the distance between the piers was 560 kilometers.
Answer: in 8 hours.