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28 Jan 2019, 08:13
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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:
35%
(medium)
Question Stats:
72% (02:16) correct
28%
(02:25)
wrong
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A field is 500 m long and 30 m broad. A tank 30 m long, 20 m broad and 12 m deep is dug in the field and the earth taken out is spread evenly over the field. Find the level of the field raised?
A. 35 cm
B. 50 cm
C. 60 cm
D. 65 cm
E. 100 cm
A. 35 cm
B. 50 cm
C. 60 cm
D. 65 cm
E. 100 cm
Updated on: 29 Jan 2019, 04:36
Originally posted by Archit3110 on 28 Jan 2019, 09:53.
Last edited by Archit3110 on 29 Jan 2019, 04:36, edited 1 time in total.
Last edited by Archit3110 on 29 Jan 2019, 04:36, edited 1 time in total.
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Bunuel
A field is 500 m long and 30 m broad. A tank 30 m long, 20 m broad and 12 m deep is dug in the field and the earth taken out is spread evenly over the field. Find the level of the field raised?
A. 35 cm
B. 50 cm
C. 60 cm
D. 65 cm
E. 100 cm
A. 35 cm
B. 50 cm
C. 60 cm
D. 65 cm
E. 100 cm
Bunuel : answer options are in cm and given info is in m..
also correct answer choice seems to be missing
area of field ; 500*30 = 15000
vol of dug earth in tank ; 30*20*12 - 7200 m^3
area of field dug =30*20 = 600
15000-600 = 14400
7200/14400 = 0.5 ~ 50 cm IMO B
28 Jan 2019, 10:48
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vol of dug earth from tank : 30*20*12 = 7200 m^3
area of field : total area of field - area of tank dug out : 500*30 - 30*20 = 15000 - 600 = 14400 m^2
level raised = vol. of earth/area = 7200/14400 = 0.5m = 50cm (Option B)
area of field : total area of field - area of tank dug out : 500*30 - 30*20 = 15000 - 600 = 14400 m^2
level raised = vol. of earth/area = 7200/14400 = 0.5m = 50cm (Option B)
