Arithmatical - Decimal Fraction
DIRECTIONS : Problems based on Decimal Fraction.
1. |
What decimal of an hour is a second? |
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A. .0025 |
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B. .0256 |
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C. .00027 |
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D. .000126 |
Solution |
Required decimal | = 1/ 60 x 60 |
= 1/ 3600 |
= .00027. |
|
2. |
The value of (4.7×13.26 + 4.7×9.43+4.7×77.31) is |
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A. 0.47 |
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B. 47 |
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C. 470 |
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D. 4700 |
Solution |
Given expression | = 4.7×(13.26+9.43+77.31) |
= 4.7 ×100 |
= 470. |
|
3. |
The value of (0.2×0.2+0.01) (0.1×0.1+0.02)-1 is equal to |
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A. 5/3 |
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B. 9/5 |
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C. 41/4 |
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D. 41/12 |
Solution |
Given expression | (0.2×0.2+0.01)/ (0.1×0.1×+0.02) |
= 0.04+0.01/0.01+0.02 |
= 0.05 / 0.03 |
= 5 / 3. |
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4. |
Which one of the following is equal to 3.14×106? |
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A. 314 |
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B. 3140 |
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C. 3140000 |
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D. None of these |
Solution |
Given, 3.14 ×106 | =3.140000×1000000 |
= 3140000. |
|
Solution |
Sum of decimals places= 6. |
14×14 | = 196. |
= s0.014×0.014 |
= 0.000196 |
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