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 2 of 5.
Ujwala said:
1 decade ago
Why to subtract thickness of both sides?
Deepak said:
1 decade ago
Why length and breadth?
Why not just breadth and considering its radius?
Why not just breadth and considering its radius?
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 !
Tejas said:
1 decade ago
What is 1 dm?
Tejaswini said:
1 decade ago
dm in the sense diameter 10cm = 1dm.
Suriya said:
1 decade ago
Hello sir if you want to find thickness of bottom. Why subtract 10 from the height instead of breath?
Mahesh said:
1 decade ago
Why we are subtracting 10? Please tell any one.
Mani said:
1 decade ago
I can't understand please tell me brief.
Sarwesh Alshi said:
1 decade ago
Why not 2x? They wrote here only as x.
Sekar agri said:
1 decade ago
@Sarwash.
Thicknes of wall in length and breath, available both side. But in height, only bottom side thickness available.
Thicknes of wall in length and breath, available both side. But in height, only bottom side thickness available.
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