Aptitude - Volume and Surface Area - Discussion
Discussion Forum : Volume and Surface Area - General Questions (Q.No. 14)
14.
A large cube is formed from the material obtained by melting three smaller cubes of 3, 4 and 5 cm side. What is the ratio of the total surface areas of the smaller cubes and the large cube?
Answer: Option
Explanation:
Volume of the large cube = (33 + 43 + 53) = 216 cm3.
Let the edge of the large cube be a.
So, a3 = 216 
a = 6 cm.
 Required ratio = |
 |
6 x (32 + 42 + 52) |  |
= | 50 | = 25 : 18. |
| 6 x 62 | 36 |
Discussion:
24 comments Page 2 of 3.
Mithilesh kumar pandey said:
6 years ago
Total surface area of cube is 6 a^2.
So that 6* (3*3+4*4+5*5) is written .
So that 6* (3*3+4*4+5*5) is written .
Patty said:
9 years ago
Really I don't know, how to calculate the answer. Please anyone help me.
MANVI MEHTA said:
10 years ago
@Hary.
Can you please explain the required ratio step more clearly?
Can you please explain the required ratio step more clearly?
Mukunthan said:
1 decade ago
While showing it shows 62 instead of 36 watch it (in denominator).
Raghavi said:
9 years ago
I too can't understand this problem. Someone explains me.
Nikita said:
8 years ago
How 216 came, can anyone explain me in simple trick?
Tuhin said:
8 years ago
I can't understand it. Someone, please explain it.
Diya said:
4 years ago
How to get the Ratio from 50/36? Please tell me.
(1)
Ramesh said:
9 years ago
Can anyone explain it in any other ways?
Ramya said:
8 years ago
How to calculate cube root of 216?
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