Question

Моторная лодка плыла 1,8 часа по течению реки и 0,7 часа по озеру.Какой путь проделала моторная лодка за этот время, если скорость течения 1,7 км ч, а собстевенная скорость лодки 18,6 км ч

Answer 1

1.7+18.6=20.3(км\ч) по реке, 1.8*20.3=36.54(км) проплыли по реке, 0.7*18.6=13,2(км) по озеру, 36.54+13.2=49.74(км) путь лодки

Answer 2

Calculation of the Distance Traveled by the Motorboat

To calculate the distance traveled by the motorboat, we need to consider the time spent traveling both upstream and downstream, as well as the speeds of the boat and the river current.

Given information: - Time spent traveling upstream (against the current): 1.8 hours - Time spent traveling downstream (with the current): 0.7 hours - Speed of the river current: 1.7 km/h - Speed of the motorboat: 18.6 km/h

To calculate the distance traveled upstream, we can use the formula: distance = speed × time. Since the boat is traveling against the current, we need to subtract the speed of the current from the speed of the boat:

Distance upstream = (boat speed - current speed) × time upstream

Substituting the given values: Distance upstream = (18.6 km/h - 1.7 km/h) × 1.8 hours

To calculate the distance traveled downstream, we use the same formula, but this time we add the speed of the current to the speed of the boat:

Distance downstream = (boat speed + current speed) × time downstream

Substituting the given values: Distance downstream = (18.6 km/h + 1.7 km/h) × 0.7 hours

Finally, to calculate the total distance traveled by the motorboat, we add the distances traveled upstream and downstream:

Total distance = Distance upstream + Distance downstream

Let's calculate the distances:

Distance upstream = (18.6 km/h - 1.7 km/h) × 1.8 hours = 30.78 km Distance downstream = (18.6 km/h + 1.7 km/h) × 0.7 hours = 14.77 km Total distance = 30.78 km + 14.77 km = 45.55 km

Therefore, the motorboat traveled a total distance of 45.55 km during the given time.

Please note that the calculations are based on the information provided and assume a constant speed throughout the journey.