Q.10
The fuel consumed by a motorcycle during a journey while traveling at various speeds
is indicated in the graph below.
Fuel Consumption: kilometres per litre
Speed: kilometres per hour
The distances covered during four laps of the journey are listed in the table below:
| Lap | Distance (kilometres) | Average speed (kilometres per hour) |
|---|---|---|
| P | 15 | 15 |
| Q | 75 | 45 |
| R | 40 | 75 |
| S | 10 | 10 |
From the given data, we can conclude that the fuel consumed per kilometre
was least during the lap
Options:
(A) P
(B) Q
(C) R
(D) S
Fuel Consumption per Kilometre – Graph Based Question
This question is based on a speed vs fuel efficiency graph.
Fuel efficiency is given in kilometres per litre (km/l).
The aim is to identify the lap where the fuel consumed per kilometre
is the least.
Important Concept
Fuel consumption per kilometre is inversely proportional
to fuel efficiency.
Higher km/l ⇒ Less fuel consumed per km
Reading the Graph
- At 10 km/h → ≈ 30 km/l
- At 15 km/h → ≈ 60 km/l
- At 45 km/h → ≈ 90 km/l
- At 75 km/h → ≈ 75 km/l
Lap-wise Analysis
Lap P
Speed = 15 km/h
Fuel efficiency ≈ 60 km/l
❌ Not the least fuel consumption
Lap Q
Speed = 45 km/h
Fuel efficiency ≈ 90 km/l (maximum)
✅ Least fuel consumed per kilometre
Lap R
Speed = 75 km/h
Fuel efficiency ≈ 75 km/l
❌ Less efficient than Q
Lap S
Speed = 10 km/h
Fuel efficiency ≈ 30 km/l
❌ Highest fuel consumption per km
Correct Answer
Option (B) – Q
Conclusion
The lap with the highest fuel efficiency will consume
the least fuel per kilometre.
Therefore, the correct answer is Lap Q.
