The boat sailed 54.9 km downstream of the river and 60.49 km upstream, how many minutes longer

| February 7, 2021 | education

The boat sailed 54.9 km downstream of the river and 60.49 km upstream, how many minutes longer the boat sailed upstream than downstream if the speed of the boat in still water is 28.4 km / h and the current speed is 2.1 km / h ?

1. Let’s determine how many km / h the speed is equal to the flow of water:

28.4 + 2.1 = 30.5 km / h.

2. Let’s calculate how long the boat covered a distance of 54.9 km at a speed of 30.5 km / h:

54.9: 30.5 = 1.8 hours.

3. Determine how many km / h the speed against the current is equal:

28.4 – 2.1 = 26.3 km / h.

4. Let’s calculate how long the boat covered a distance of 60.49 km at a speed of 26.3 km / h:

60.49: 26.3 = 2.3 hours.

5. Determine how many minutes it took the road upstream:

2.3 – 1.8 = 0.5 hours

0.5 hours = 30 minutes.

Answer: the boat trip upstream took 30 minutes more.



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