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 |
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 3 of 4.
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.
And 0.04 = 4/100 = 2(2/100) = 2 * (0.02).
Taking 2 in common, expression can be written as given explanation.
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.
So, 0.9/0.70 = 0.125.
Shiva kumar said:
8 years ago
Friends its very simple first remove decimals then you get.
(1^3+2^3/2^3+4^3) = 1+8/8+64 = 9/72 = 1/8.
Dividing you get 0.125.
(1^3+2^3/2^3+4^3) = 1+8/8+64 = 9/72 = 1/8.
Dividing you get 0.125.
(3)
Sumon said:
8 years ago
Explanation.
0.1^3+0.2^3/0.2^3+0.4^3 look here,
.04^3 means.0.2^3*0.2^3.
So, 0.1/2^3.
0.1^3+0.2^3/0.2^3+0.4^3 look here,
.04^3 means.0.2^3*0.2^3.
So, 0.1/2^3.
(2)
Prayag k babu said:
7 years ago
Hi guys,
We take 2 common in the denominator so that we can cancel the numerator and denominator and post that we are only left with 1/2 and not 1/2^3. Hence the answer is 1/2 that is 0. 5.
If you don't understand just take an example. We have denominator as 8*8*8+4*4*4. So let's take 2 commons, So it will be 2[4*4*4+2*2*2].
Which is nothing but 2[4^3+2^3]. The 2 which we took as common cannot have power 3.
Hope this helps you.
We take 2 common in the denominator so that we can cancel the numerator and denominator and post that we are only left with 1/2 and not 1/2^3. Hence the answer is 1/2 that is 0. 5.
If you don't understand just take an example. We have denominator as 8*8*8+4*4*4. So let's take 2 commons, So it will be 2[4*4*4+2*2*2].
Which is nothing but 2[4^3+2^3]. The 2 which we took as common cannot have power 3.
Hope this helps you.
(2)
Jyoshna said:
7 years ago
How 1/8=0.125? explain.
(1)
Sowmie said:
7 years ago
Just multiply 0.1 * 10 we get 1.
Then 0.2 * 10=2 so 2^3 is 8.
Then 0.04 * 100=4 so 4^3 Is 64.
Then 0.02 * 100=2 so 2^3 is 8.
Now, 1 + 8/8 + 64 = 9/72 = 1/8 = 0.125.
Then 0.2 * 10=2 so 2^3 is 8.
Then 0.04 * 100=4 so 4^3 Is 64.
Then 0.02 * 100=2 so 2^3 is 8.
Now, 1 + 8/8 + 64 = 9/72 = 1/8 = 0.125.
(14)
Sahil said:
7 years ago
0.5 can be the answer.
(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.
Hence 1/2^3 that is 0.125.
(1)
Mun said:
6 years ago
Easy :
We can take cube for above question:
1st remove decimal and take cube 10^3 = 1000 and 2^3 = 8 / 20^3=8000 and 4^3 = 64.
Then 10000+8/8000+64.
Then we get 1/8 and.
0. 125 answer.
We can take cube for above question:
1st remove decimal and take cube 10^3 = 1000 and 2^3 = 8 / 20^3=8000 and 4^3 = 64.
Then 10000+8/8000+64.
Then we get 1/8 and.
0. 125 answer.
(4)
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