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Aptitude miscellaneous
The value of
(3.2)
3
− 0.008
is
(3.2)
2
+ 0.64 + 0.04
0
2.994
3.208
3
Correct Option:
D
Expression =
(3.2)
3
− (0.2)
3
(3.2)
2
+ 3.2 × 0.2 + (0.2)
2
Let 3.2 = a and 0.2 = b
∴ Expression =
a
3
− b
3
a
2
− ab + b
2
=
(a − b)(a
2
+ ab + b
2
)
= a − b
a
2
+ ab + b
2
= 3.2 – 0.2 = 3
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