Question

"Метеор" прошёл сначала 1,2 ч по озеру со скоростью 59 км/ч, а затем по реке против течения 0,8 ч. Вычисли длину маршрута катера на подводных крыльях,если скорость течения реки 1,6 км/ч.

Answer 1

1)1,2*59=70,8(км)- по озеру                                                             2)0,8*(59-1,6)=0,8*57,4=45,92(км)- по реке против течения        
3) 70,8+45,92=116,72(км)- длина маршрута 

Answer 2

Calculating the Length of the Boat's Route

To calculate the length of the boat's route on underwater wings, we can use the formula:

Distance = Speed × Time

First, let's calculate the distance traveled on the lake and then on the river.

1. Distance Traveled on the Lake: - Time taken on the lake = 1.2 hours - Speed on the lake = 59 km/h - Using the formula, Distance = Speed × Time: - Distance on the lake = 59 km/h × 1.2 h = 70.8 km

2. Distance Traveled on the River: - Time taken on the river = 0.8 hours - Speed of the boat relative to the river's current = Speed of the boat - Speed of the river's current - Speed of the boat = Speed of the river's current + Speed of the boat relative to the river's current - Speed of the boat = 1.6 km/h + 59 km/h = 60.6 km/h - Using the formula, Distance = Speed × Time: - Distance on the river = 60.6 km/h × 0.8 h = 48.48 km

3. Total Distance Traveled: - Total distance = Distance on the lake + Distance on the river - Total distance = 70.8 km + 48.48 km = 119.28 km

Therefore, the length of the boat's route on underwater wings is approximately 119.28 kilometers.