Question

plz tell Question-5 to 13

Answer 1

Hiii. ......friend

The answer is here,

5)
$= > \: \sqrt[3]{50} = 3.684$
This implies,

$= > \:( {3.684)}^{3} = 50$

$= > \: ( {( {3.684})^{3} )}^{2}$

$= > \: ({50)}^{2}$

=> 2500.

OptionD.

6)

$= > \: \sqrt[3]{ \frac{128}{250} }$
$= > \: \sqrt[3]{ \frac{64}{125} } = \frac{4}{5}$

OptionC is correct.

7)

$= > \: \sqrt[3]{ - 8000}$
$= > \: \sqrt[3]{( { - 1})^{3} \times {2}^{3} \times {10}^{3} }$

$= > \: \sqrt[3]{ { - 20}^{3} }$

$= > \: - 20$
OptionC is correct.

8)

$= > \:( { - 4)}^{3} = (- 4 )\times( - 4) \times( - 4)$

=> -64.

OptionA is correct.

9)

Cube of an odd number is always a odd no.

And cube of a even number is always even number.

10)

$= > \: \sqrt[3]{ - 125 \times 729}$
$= > \: \sqrt[3]{( { - 1})^{3} \times {5}^{3} \times {9}^{3} }$

$= > \: \sqrt[3]{ ({ - 45})^{3} } = - 45$

OptionD is correct.

11)

=> 675 =3×3×3×5×5

Make a group of 3 numbers.

=> (3×3×3)×(5×5).

So, To make 675 as perfect cube we have to multiply with 5.

OptionD is correct.

12)

405 =5×3×3×3×3.

Make a group of 3 numbers.

=> (3×3×3)×3×5

=> (3×3×3)×15.

So, To make 405 perfect cube we have to divide it by 15.

OptionC is correct.

13)

Volume of cube => side×side×side.

=> 1.8×1.8×1.8

=> 5.832cubic.cm
So, OptionB is correct.

:-)Hope it helps u.