GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 21 Feb 2019, 03:59

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

## Events & Promotions

###### Events & Promotions in February
PrevNext
SuMoTuWeThFrSa
272829303112
3456789
10111213141516
17181920212223
242526272812
Open Detailed Calendar

February 21, 2019

February 21, 2019

10:00 PM PST

11:00 PM PST

Kick off your 2019 GMAT prep with a free 7-day boot camp that includes free online lessons, webinars, and a full GMAT course access. Limited for the first 99 registrants! Feb. 21st until the 27th.
• ### Free GMAT RC Webinar

February 23, 2019

February 23, 2019

07:00 AM PST

09:00 AM PST

Learn reading strategies that can help even non-voracious reader to master GMAT RC. Saturday, February 23rd at 7 AM PT

# A field is 500 m long and 30 m broad. A tank 30 m long, 20 m broad and

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 53061
A field is 500 m long and 30 m broad. A tank 30 m long, 20 m broad and  [#permalink]

### Show Tags

28 Jan 2019, 07:13
00:00

Difficulty:

35% (medium)

Question Stats:

50% (02:04) correct 50% (02:25) wrong based on 26 sessions

### HideShow timer Statistics

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

_________________
SVP
Joined: 18 Aug 2017
Posts: 1887
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
A field is 500 m long and 30 m broad. A tank 30 m long, 20 m broad and  [#permalink]

### Show Tags

Updated on: 29 Jan 2019, 03:36
1
Bunuel wrote:
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

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
_________________

If you liked my solution then please give Kudos. Kudos encourage active discussions.

Originally posted by Archit3110 on 28 Jan 2019, 08:53.
Last edited by Archit3110 on 29 Jan 2019, 03:36, edited 1 time in total.
Intern
Joined: 21 Jan 2019
Posts: 1
Re: A field is 500 m long and 30 m broad. A tank 30 m long, 20 m broad and  [#permalink]

### Show Tags

28 Jan 2019, 09:48
1
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)
e-GMAT Representative
Joined: 04 Jan 2015
Posts: 2589
Re: A field is 500 m long and 30 m broad. A tank 30 m long, 20 m broad and  [#permalink]

### Show Tags

29 Jan 2019, 03:31

Solution

Given:
• The length of field = 500 m
• The breadth of field = 30 m
• The length of tank = 30 m
• The breadth of tank = 20 m, and
• The height of tank = 12 m

To find:
• The level of field raised

Approach and Working:
• Volume of the tank = $$30 * 20 * 12 = 7200 m^3$$
• Area of field – area of tank = $$500 * 30 – 30 * 20 = 14400 m^2$$

Therefore, level of field raised = $$\frac{7200}{14400} m = 0.5 m = 50 cm$$

Hence, the correct answer is Option B

_________________

| '4 out of Top 5' Instructors on gmatclub | 70 point improvement guarantee | www.e-gmat.com

Re: A field is 500 m long and 30 m broad. A tank 30 m long, 20 m broad and   [#permalink] 29 Jan 2019, 03:31
Display posts from previous: Sort by