The own speed of the ship is 21.6 km / h. The speed of the current is 4.9 km / h.

| March 15, 2021 | education

The own speed of the ship is 21.6 km / h. The speed of the current is 4.9 km / h. Find the speed of the ship upstream and upstream.

Based on the condition, it is necessary to calculate the speed of the motor ship downstream and upstream.
Since when moving with the flow of the motor ship, the speed increases by the value of the flow, therefore
Vfor flow = Vtot heat + Vflow, where Vtot heat is the own speed of the motor ship, Vflow is the speed of the current
Substitute the values ​​and find the downstream speed
Vfor current = 21.6 + 4.9 = 26.5 km / h
Since when moving against the current at the motor ship, the speed decreases by the value of the current, therefore
Vfor flow = Vtot heat-Vflow, where Vtot heat is the own speed of the motor ship, Vflow is the speed of the current
Substitute the values ​​and find the speed upstream
V over flow = 21.6-4.9 = 16.7 km / h
Answer: 26.5 km / h and 16.7 km / h



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