\( { }^{*} \) Look at the rate in \( \mathrm{km} / \mathrm{h} \). Hours and minutes must be conve \[ \text { Speed }=80 \mathrm{~km} / \mathrm{h} \] Distance \( = \) ?? \[ \text { Time }=3 \text { hours } 15 \mathrm{~min} \longrightarrow 195 \text { minutes } \longrightarrow 3,25 \text { ure } \] \[ \text { Distance }=\text { Speed } \times \text { time } \] \[ =80 \mathrm{~km} / \mathrm{h} \times 3,25 \text { hours } \] ... appropriate formule \[ =260 \mathrm{~km} \] ... substitution (look at the conversion o ... answer in km* Part 2: What is the constant speed that the car needs to drive to cover 2 hours 40 min .

Sure, let's work through **Part 2** of your problem step by step. ### **Part 2: Determining the Required Constant Speed** **Given:** - **Distance (D)** = 260 km (from Part 1) - **Time (T)** = 2 hours 40 minutes **Objective:** Find the constant speed (\( V \)) required to cover 260 km in 2 hours 40 minutes. #### **Step 1: Convert Time to Hours** First, convert the time from hours and minutes to a decimal format in hours. \[ \text{Time} = 2 \text{ hours } 40 \text{ minutes} = 2 + \frac{40}{60} = 2 + \frac{2}{3} \approx 2.6667 \text{ hours} \] #### **Step 2: Use the Speed Formula** The basic formula to calculate speed is: \[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} \] Plugging in the known values: \[ V = \frac{260 \text{ km}}{2.6667 \text{ hours}} \] #### **Step 3: Perform the Calculation** \[ V \approx \frac{260 \text{ km}}{2.6667 \text{ hours}} \approx 97.5 \text{ km/h} \] #### **Conclusion** To cover a distance of **260 km** in **2 hours and 40 minutes**, the car must maintain a **constant speed of approximately 97.5 km/h**. \[ \boxed{V \approx 97.5 \ \mathrm{km/h}} \]