The distance between the quays is 378 km. How long does it take for a motor ship
| January 5, 2021 | education
The distance between the quays is 378 km. How long does it take for a motor ship to sail back and forth if its speed is 27 km / h down the river and 21 km / h upstream?
Given:
Distance between quays = 378km
Downstream speed 27km / h
Upstream speed 21 km / h
To find:
The time it takes for the steamer to sail there and back
Decision:
1) 378: 27 = 14 (h)
2) 378: 21 = 18 (h)
3) 14 + 18 = 32 (h)
Answer: 32
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