Aptitude - Volume and Surface Area - Discussion
Discussion Forum : Volume and Surface Area - General Questions (Q.No. 9)
9.
A cistern 6m long and 4 m wide contains water up to a depth of 1 m 25 cm. The total area of the wet surface is:
Answer: Option
Explanation:
| Area of the wet surface | = [2(lb + bh + lh) - lb] |
| = 2(bh + lh) + lb | |
| = [2 (4 x 1.25 + 6 x 1.25) + 6 x 4] m2 | |
| = 49 m2. |
Discussion:
40 comments Page 4 of 4.
Sandya said:
9 years ago
Can anyone explain how did you get 1.25?
Sam said:
1 decade ago
Otherwise use 2*6*1.25+2*4*1.25+6*4= 49.
Sanjana said:
8 years ago
Please explain the formula 2lh+2bh+lb.
(1)
Ankita Sood said:
1 decade ago
Because it is not full till the top
Raju said:
8 years ago
Good explanation, Thanks @Mubarak.
Roshan said:
1 decade ago
Why cuboid? is it not a cylinder?
Vicky said:
7 years ago
Good explanation, thanks all.
(1)
Samim Ali said:
9 years ago
Thanks for the explanation.
Shenga said:
6 years ago
See @nitya's answer.
(2)
Rajesh said:
1 decade ago
This lb lh bh Means?
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