The motor ship sailed 4.5 hours against the current and 0.8 hours along the river. What way did the motor

| August 8, 2021 | education

The motor ship sailed 4.5 hours against the current and 0.8 hours along the river. What way did the motor ship go if its speed against the current is 24.6 km / h, and the speed of the current is 1.8 km / h.

Since the motor ship moved along and against the current of the river, its speed was different and depended on the speed of the river.

1) Find out how many kilometers a motor ship passes in stagnant water in one hour (own speed): 24.6 + 1.8 = 26.4 (km / h);

2) Add the speed of the river to the own speed of the motor ship and find the speed of the watercraft downstream: 26.4 + 1.8 = 28.2 (km / h);

3) How many kilometers did the motor ship cover upstream of the river?

24.6 * 4.5 = 110.7 (km);

4) How many kilometers did the ship move downstream?

28.2 * 0.8 = 22.56 (km);

5) 110.7 + 22.56 = 133.26 (km) – total distance.

Answer: 133.26 km – in total, the motor ship covered the entire time.



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