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07 Jan 2019, 04:04
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
82% (01:21) correct
18%
(01:50)
wrong
based on 173
sessions
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Pipe A can fill a tank in 3 hours. If pipe B can fill the same tank in 2 hours, how many minutes will it take both pipes to fill 2/3 of the tank?
A. 30
B. 48
C. 54
D. 60
E. 72
A. 30
B. 48
C. 54
D. 60
E. 72
Updated on: 08 Jan 2019, 01:47
Originally posted by Archit3110 on 07 Jan 2019, 04:15.
Last edited by Archit3110 on 08 Jan 2019, 01:47, edited 2 times in total.
Last edited by Archit3110 on 08 Jan 2019, 01:47, edited 2 times in total.
Kudos
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Bunuel
Pipe A can fill a tank in 3 hours. If pipe B can fill the same tank in 2 hours, how many minutes will it take both pipes to fill of the tank?
A. 30
B. 48
C. 54
D. 60
E. 72
A. 30
B. 48
C. 54
D. 60
E. 72
combined rate ' 1/3+1/2 = 5/6
time 6/5 * 60 = 72
2/3 * 72 = 48 mins IMO B
or say
180 mins and 120 mins
1/180 + 1/120 ; 5/360 ; 72 mins
2/3 * 72 = 48 mins IMO B
08 Jan 2019, 01:43
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Archit3110
Bunuel
Pipe A can fill a tank in 3 hours. If pipe B can fill the same tank in 2 hours, how many minutes will it take both pipes to fill of the tank?
A. 30
B. 48
C. 54
D. 60
E. 72
A. 30
B. 48
C. 54
D. 60
E. 72
Bunuel : answer choice given seems to be incorrect correct option should be e 72.
combined rate ' 1/3+1/2 = 5/6
time 6/5 * 60 = 72 IMO E
or say
180 mins and 120 mins
1/180 + 1/120 ; 5/360 ; 72 mins E ..
Sorry Archit. There was a copy/paste error. Corrected question reads: how many minutes will it take both pipes to fill 2/3 of the tank? Edited. Thank you.
