Aptitude - Volume and Surface Area - Discussion
Discussion Forum : Volume and Surface Area - General Questions (Q.No. 12)
12.
A cistern of capacity 8000 litres measures externally 3.3 m by 2.6 m by 1.1 m and its walls are 5 cm thick. The thickness of the bottom is:
Answer: Option
Explanation:
Let the thickness of the bottom be x cm.
Then, [(330 - 10) x (260 - 10) x (110 - x)] = 8000 x 1000
320 x 250 x (110 - x) = 8000 x 1000
| (110 - x) = |
8000 x 1000 | = 100 |
| 320 x 250 |
x = 10 cm = 1 dm.
Discussion:
49 comments Page 3 of 5.
Rehan said:
6 years ago
@All.
When they mention the thickness of walls as 5 cm, it can also mean the bottom, isn't it?
The bottom can also have the same thickness in that sense, right?
When they mention the thickness of walls as 5 cm, it can also mean the bottom, isn't it?
The bottom can also have the same thickness in that sense, right?
Mahek said:
6 years ago
@Rehan.
They have given thickness of walls only not the bottom, so the thickness of the bottom may or may not be equal to the wall.
They have given thickness of walls only not the bottom, so the thickness of the bottom may or may not be equal to the wall.
Akshau said:
6 years ago
dm means decameter.
10cm=1 decameter.
10cm=1 decameter.
Rahul said:
4 years ago
How we get 10 multiples of each breadth depth and length? Please explain.
Ali said:
3 years ago
Why we should take 3.3 as length? Please explain me.
Sharma said:
1 decade ago
It's clearly given that thickness of the wall is 5cm.
Bottom part is not a wall, it is unknown, So consider X.
Thank You !
Bottom part is not a wall, it is unknown, So consider X.
Thank You !
Priya jain said:
1 decade ago
@deepa
The thickness is given as 5 cm and the dimensions given are external dimensions so in order to get internal dimension we subract the external dimensions by thichness on both sides so 5*2=10
The thickness is given as 5 cm and the dimensions given are external dimensions so in order to get internal dimension we subract the external dimensions by thichness on both sides so 5*2=10
Ashish said:
1 decade ago
How we can say 1.1m as bottom ? it is v=l*b*h.
Vani varma said:
1 decade ago
@ashish.........
3.3 , 2.6 and 1.1 are the length breadth and depth of the cistern respectively..
1.1 is the total depth of the cistern including its thickness....
and the thickness at bottom is vat we need to find out.....
3.3 , 2.6 and 1.1 are the length breadth and depth of the cistern respectively..
1.1 is the total depth of the cistern including its thickness....
and the thickness at bottom is vat we need to find out.....
Rahul said:
1 decade ago
Why 8000 is multiplied by 1000?
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