Aptitude - Decimal Fraction - Discussion

Discussion Forum : Decimal Fraction - General Questions (Q.No. 4)
4.
The value of 0.1 x 0.1 x 0.1 + 0.02 x 0.02 x 0.02 is:
0.2 x 0.2 x 0.2 + 0.04 x 0.04 x 0.04
0.0125
0.125
0.25
0.5
Answer: Option
Explanation:
Given expression = (0.1)3 + (0.02)3 = 1 = 0.125
23 [(0.1)3 + (0.02)3] 8
Discussion:
34 comments Page 2 of 4.

Vasista said:   6 years ago
0.1X0.1X0.1/((2X0.1)+(2X0.1)+(2X0.1) and so on;

Hence 1/2^3 that is 0.125.
(1)

Jyoshna said:   7 years ago
How 1/8=0.125? explain.
(1)

Chakresh patel said:   9 years ago
Thanks @Hema.

Saddam said:   8 years ago
(0.1)^3+(0.2)^3=0.9 /(0.2)^3+(0.4)^3 = 0.70,
So, 0.9/0.70 = 0.125.

Anupama said:   8 years ago
0.2 = 2/10 = 2 * (0.1).
And 0.04 = 4/100 = 2(2/100) = 2 * (0.02).

Taking 2 in common, expression can be written as given explanation.

Vasu said:   9 years ago
2((0.1)^3 + (0.02)^3) = (0.2)^3 + (0.04)^3 why do we have to take 2^3 out of it?

Jeyendran-EEE said:   9 years ago
We take root of 1/8,

Then we get the answer 0.125.

Manuj said:   1 decade ago
Can anyone explain the numerator?

Sarada said:   1 decade ago
How can you common 2^3 from denominator?

Sukeshani Kadam said:   1 decade ago
I don't understand this proble. Please explain


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