XAT 2012 — QA & DI Question 14
Answer the following question based on the information given below.
Ramya, based in Shanpur, took her car for a 400 km trip to Rampur. She maintained a log of the odometer readings and the amount of petrol she purchased at different petrol pumps at different prices (given below). Her car already had 10 litres of petrol at the start of the journey, and she first purchased petrol at the start of the journey, as given in table below, and she had 5 litres remaining at the end of the journey.
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What has been the mileage (in kilometers per litre) of her car over the entire trip?
Answer & solution
8.00
- B
8.50
- C
9.00
- D
9.50
- E
None of the above
Ramya has 10 litres petrol in her car to start with.
She purchased 20 litres, 15 litres and 10 litres on three occasions.
She was left with 5 litres in her car at the end of the journey.
Hence, she utilized (10 + 20 + 15 + 10 – 5) = 50 litres.
She travelled (800 – 400) = 400 km.
Hence, the mileage of Ramya’s car = 400/50 = 8 km/litre
Hence, option (a).