CAT 2001 — QA Question 49
Basics of TSD/ProportinalityEasy
Passage / Data
Answer the following question based on the information given below.
The petrol consumption rate of a new model car 'Palto' depends on its speed and may be described by the graph below
Manasa would like to minimize the fuel consumption for the trip by driving at the appropriate speed. How should she change the speed?
Answer & solution
- A
Increase the speed
Decrease the speed
- C
Maintain the speed at 60 km/hour
- D
Cannot be determined
Solution
If the speed is 40 km/hour, then fuel consumption is given by,
(200/40) × 2.5 = 12.5 litres (< 13.33 litres)
∴ For reducing the fuel consumption, she should reduce the speed from 60 km/hour.
Hence, option (b).