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A bus diver drove at an average speed of...

A bus diver drove at an average speed of 45 miles per hour for 3 hours while the bus consumed fuel at a rate of 15 miles per gallon. How many gallons of fuel did the bus use for the entire 3 - hour trip?

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To solve the problem step by step, we will follow these calculations: ### Step 1: Calculate the total distance traveled by the bus. The formula to calculate distance is given by: \[ \text{Distance} = \text{Speed} \times \text{Time} \] Given: - Average speed of the bus = 45 miles per hour - Time traveled = 3 hours Now, substituting the values into the formula: \[ \text{Distance} = 45 \, \text{miles/hour} \times 3 \, \text{hours} = 135 \, \text{miles} \] ### Step 2: Determine the fuel consumption rate. The fuel consumption rate is given as: \[ \text{Fuel consumption rate} = 15 \, \text{miles per gallon} \] ### Step 3: Calculate the total gallons of fuel used. To find the total gallons of fuel used, we will use the formula: \[ \text{Gallons of fuel} = \frac{\text{Total distance}}{\text{Fuel consumption rate}} \] Substituting the values we calculated: \[ \text{Gallons of fuel} = \frac{135 \, \text{miles}}{15 \, \text{miles/gallon}} = 9 \, \text{gallons} \] ### Conclusion: The bus used a total of **9 gallons** of fuel for the entire 3-hour trip. ---
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