Aptitude - Volume and Surface Area - Discussion
Discussion Forum : Volume and Surface Area - General Questions (Q.No. 3)
3.
A hall is 15 m long and 12 m broad. If the sum of the areas of the floor and the ceiling is equal to the sum of the areas of four walls, the volume of the hall is:
Answer: Option
Explanation:
2(15 + 12) x h = 2(15 x 12)
 h = |
180 | m = | 20 | m. |
| 27 | 3 |
 Volume = |
 |
15 x 12 x | 20 |  m3 |
= 1200 m3. |
| 3 |
Video Explanation: https://youtu.be/V8EQ1YIaH74
Discussion:
75 comments Page 2 of 8.
Erika said:
8 years ago
Why isn't an area of four walls equal to 4*l*b?
Harsh said:
9 years ago
I cannot understand this. Someone help me.
A. Rishikesh said:
9 years ago
Easy to understand now with the help of given explanation, Thank you all.
TAMIZHARASI.G said:
9 years ago
Thank you all for the given explanation.
SKSENA said:
9 years ago
Thanks for all the given explanation of the answer.
Rafiq said:
8 years ago
Thanks @Lokesh.
Arun Dhaduk said:
8 years ago
We have given l=15, b=12.
Area of ceiling + floor = Area of four wall,
2(l*b) = 2(12*h)+2(15*h),
( because opposites walls are of same area)
2(15*12)=2h(12+15),
h=180/27.
Area of ceiling + floor = Area of four wall,
2(l*b) = 2(12*h)+2(15*h),
( because opposites walls are of same area)
2(15*12)=2h(12+15),
h=180/27.
Bir Bahadur Singh said:
8 years ago
I cannot understand this, please explain.
Sujatha said:
8 years ago
Will anyone help me to getting this?
Ramya said:
8 years ago
Anyone help me to understand this easily?
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