Question

1. Лодка перемещается сначала по течению реки, а затем против течения. Вычислить путь пройденной лодкой, если её скорость в стоячей воде v км/ ч скорость течения vr км/ч, время движения по течению t1 ч, а против течения t2 ч.ПАСКАЛЬ!!!

Answer 1

Путь пройденный по озеру составит V*t1, Путь пройденный по реке составит t2*(V-V1), весь путь V*t1+t2*(V-V1)
я так думаю

Answer 2

Calculating the Distance Traveled by the Boat

To calculate the distance traveled by the boat, we can use the following formula derived from the given information:

\(\frac{L}{{t}_{2}}={{V}_{L}}+{{V}_{T}}\), where \(L\) is the distance, \({t}_{2}\) is the time taken to travel against the current, \({V}_{L}\) is the speed of the boat in still water, and \({V}_{T}\) is the speed of the current.

We also have the equation \(\frac{L}{{t}_{1}}={{V}_{L}}-{{V}_{T}}\), where \({t}_{1}\) is the time taken to travel with the current.

By subtracting the two equations, we get \(\frac{L}{{t}_{2}}-\frac{L}{{t}_{1}}=2\cdot {{V}_{T}}\).

Using this information, we can calculate the time taken to travel against the current (\({t}_{2}\)) and then use it to find the distance traveled by the boat.

Calculation Steps

1. Calculate \(t_{2}\): - Using the given values, we can calculate \({t}_{2}\) using the formula: \({t}_{2}=\frac{L}{2\cdot {V}_{T}+\frac{L}{{t}_{1}}}\). - Substituting the given values, we get: \({t}_{2}=\frac{4}{2\cdot 2.5+\frac{4}{3}}\approx 0.6\) hours.

2. Calculate Distance Traveled: - Now that we have \({t}_{2}\), we can use it to find the distance traveled by the boat. - Using the formula \(\frac{L}{{t}_{2}}={{V}_{L}}+{{V}_{T}}\), we can solve for \(L\).

Conclusion

The distance traveled by the boat can be calculated using the given values and the derived formulas.