QuestionSeconds to tad 200 km dan the arar. $\qquad$
2. A river flows north with a current of 4.0 meters per second. a. If it takes a motor boat 7.0 minutes to travel 1.5 km
Part A upstream (against the current), at what speed can the motor whet suedat push the boat through the water? $7 \mathrm{~min}+1 \mathrm{~s}^{2} \mathrm{~mm}$ b. How long will it take the boat to travel 2 km ? $$G$$ $G:$ n！ E:
8! 9 :

Studdy Solution
For downstream travel, the effective speed is $v + 4.0$.
The distance to travel downstream is 2 km, which is: $$2 \text{ km} = 2000 \text{ meters}$$
Calculate the time taken using the formula $\text{time} = \frac{\text{distance}}{\text{speed}}$: $$\text{time} = \frac{2000}{7.57 + 4.0}$$
$$\text{time} = \frac{2000}{11.57} \approx 172.85 \text{ seconds}$$
Convert time back to minutes if needed: $$172.85 \text{ seconds} \approx 2.88 \text{ minutes}$$
The speed of the motorboat in still water is $7.57 \text{ meters per second}$, and the time to travel 2 km downstream is approximately $2.88 \text{ minutes}$.