(a) To calculate the distance driven each hour and the amount of fuel used for each hour, we can break this problem down into a step-by-step approach.
Step 1: Calculate distance driven each hour. Milan drove 50.8 km in 4 hours. To find the distance he drove each hour, we can calculate it as follows:
\[ \text{Distance per hour} = \frac{\text{Total distance}}{\text{Total time}} = \frac{50.8 \text{ km}}{4 \text{ hours}} = 12.7 \text{ km/hour} \]
Distance driven each hour: 12.7 km
Step 2: Calculate fuel needed for each hour. According to the information, each kilometer required 3 liters of fuel. Therefore, for the distance driven each hour:
\[ \text{Fuel per hour} = \text{Distance per hour} \times \text{Fuel per kilometer} = 12.7 \text{ km} \times 3 \text{ liters/km} = 38.1 \text{ liters/hour} \]
Amount of fuel used for each hour: 38.1 liters
Summary for 7 hours:
1 hour:
Distance: 12.7 km
Fuel: 38.1 liters
2 hours:
Distance: 25.4 km
Fuel: 76.2 liters
3 hours:
Distance: 38.1 km
Fuel: 114.3 liters
4 hours:
Distance: 50.8 km
Fuel: 152.4 liters
5 hours:
Distance: 63.5 km
Fuel: 190.5 liters
6 hours:
Distance: 76.2 km
Fuel: 228.6 liters
7 hours:
Distance: 89.0 km
Fuel: 266.7 liters
(b) To calculate how much fuel would be needed to drive for 7 hours:
\[ \text{Total fuel for 7 hours} = \text{Fuel per hour} \times \text{Total hours} = 38.1 \text{ liters/hour} \times 7 \text{ hours} = 266.7 \text{ liters} \]
Answer for (b): 266.7 liters