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24 May 2022, 02:30
Kudos
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
72% (01:47) correct
28%
(03:22)
wrong
based on 32
sessions
History
Date
Time
Result
Not Attempted Yet
Two full tanks, one shaped like a cylinder and the other like a cone, contain jet fuel. The cylindrical tank holds 500 litres more than the conical tank. After 200 litres of fuel has been pumped out from each tank the cylindrical tank contains twice the amount of fuel than the conical tank. How many litres of fuel did the cylindrical tank had when it was full?
A. 700
B. 800
C. 1000
D. 1100
E. 1200
A. 700
B. 800
C. 1000
D. 1100
E. 1200
24 May 2022, 06:56
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Bunuel
Let cylindrical tank capacity = Cy
Let conical tank capacity = Co
Given that
Cy = Co + 500 ---- (I)
Cy - 200 = 2(Co - 200) => Cy = 2Co - 200 --- (II)
Taking (I) and (II) together we get
Co = 700
=> Cy = Co + 500 = 1200
Option E
24 May 2022, 07:05
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Bunuel
Forget the algebra. Let's just PITA (Plug In The Answers).
I usually like testing B and D. Let's start with B.
Full Cylinder is 800. Full Cone is 300. After removing 200 from each, Cylinder has 600 and Cone has 100. That's 5x, not 2x. Wrong.
Okay, let's try D.
Full Cylinder is 1100. Full Cone is 600. After removing 200 from each, Cylinder has 900 and Cone has 400. That's 2.25x, not 2x. Wrong.
B was very wrong. D got us closer, but not all the way to the right answer. Must be E.
Answer choice E.
ThatDudeKnowsPITA
