Timework24
Refer to the graph below and answer the questions that follow.
The engine of the new car Palio brought by Fiat in the
market follows certain mileage characteristics as
shown in the diagram below:
Vijay bought the new car Palio and filled exactly 10
litres in his car. He goes at a speed of 40 km/hr for
first 20 km and then at a speed of 60 km/hr for next 60
km and driving at a constant speed reaches his
destination which was 115 km away from his starting
point.
hours
hours
hours- Option : C
- Explanation : Fuel required for first 20 km = 20/8 = 2.5 litres
Fuel required for next 60 km = 60/15 = 4 litres.
∴ Petrol left = 10 - 6.5 = 3.5 litres.
Now, he has to travel = 115 - (60 + 20)
= 35 km in 3.5 litres.
So he can go at a speed of either 45 km/hr or
80 km/hr as mileage is 10 km/litre in both cases.
But since he reaches in minimum time, he travels
at 80 km/hr
= 1 hours 56 minutes and 25 seconds.
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