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09 Jan 2020, 03:17
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
66% (03:22) correct
34%
(03:12)
wrong
based on 127
sessions
History
Date
Time
Result
Not Attempted Yet
Rajiv reaches city B from city A in 4 hours, driving at the speed of 35 km per hour for the first 2 hours and at 45 km per hour for the next two hours. Aditi follows the same route, but drives at three different speeds 30, 40 and 50 km per hour, covering an equal distance in each speed segment. The two cars are similar with petrol consumption characteristics (km per litre) shown in the figure below.
The amount of petrol consumed by Aditi for the journey is
(A) 8.3 litres
(B) 8.6 litres
(C) 8.9 litres
(D) 9.2 litres
(E) 9.2 litres
2020-01-09_1413.png [ 23.82 KiB | Viewed 11340 times ]
The amount of petrol consumed by Aditi for the journey is
(A) 8.3 litres
(B) 8.6 litres
(C) 8.9 litres
(D) 9.2 litres
(E) 9.2 litres
Attachment:
2020-01-09_1413.png [ 23.82 KiB | Viewed 11340 times ]
09 Jan 2020, 03:37
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Bunuel
Explanation:
Distance between A & B = 35*2 + 45* 2 =160 km
Distance covered by Aditi in each speed segment = 160/3
petrol consumed by Aditi when he drives at 30kmph= 160/3∗1/16
petrol consumed by Aditi when he drives at 40kmph= 160/3∗1/24
petrol consumed by Aditi when he drives at 50kmph=160/3∗1/16
The quantity of petrol consumed by Aditi for the journey is=
160/3∗1/16 +160/3∗1/24 +160/3∗1/16 =8.91
IMO-C
