Q. 24.6( 13 Votes )

# Evaluate:

(i) (1.2)^{3}

(ii) (3.5)^{3}

(iii) (0.8)^{3}

(iv) (0.05)^{3}

Answer :

(i) To calculate the cube of (1.2)^{3}

We have to multiply the given number three times;

= (1.2 × 1.2 × 1.2) = 1.728

Now by converting it into fraction we get,

=

(ii) To calculate the cube of (3.5)^{3}

We have to multiply the given three times;

= (3.5 × 3.5 × 3.5) = 42.875

Now by converting it into fraction we get,

=

(iii) To calculate the cube of (0.8)^{3}

We have to multiply the given number by its power;

= (0.8 × 0.8 × 0.8) = 0.512

Now by converting it into fraction we get,

=

(iv) To calculate the cube of (0.05)^{3}

We have to multiply the given number by its power;

= (0.05 × 0.05 × 0.05) = 0.000125

Now by converting it into fraction we get,

=

Rate this question :

Which of the following numbers are not perfect cubes?

(i) 64

(ii) 216

(iii) 243

(iv) 1728

RD Sharma - MathematicsFind the cubes of the following numbers by column method:

(i) 35

(ii) 56

(iii) 72

RD Sharma - Mathematics