Given, √x/169 = 18/13
On squaring both sides, we get
x/169 = 18/13 x 18/13
Solve the equation.

Correct Option: B

Given, √x/169 = 18/13
On squaring both sides, we get
x/169 = 18/13 x 18/13
∴ x = 18 x 18 x 169/13 x 13
x = 18 x 18 = 324

√0.4
= √4/9
= 2/3 = 0.666
= 0.6

Correct Option: A

√0.4
= √4/9
= 2/3 = 0.666
= 0.6

√105⁴/₆₄
= √6724/64

Correct Option: C

√105⁴/₆₄
= √6724/64
= 82/8 = 41/4 = 10¹/₄

√110¹/4
Multiply the denominator 4 with 100 and add the numerator 1.
= √441 / 4
Simply the number in simple multiplication
= √3 x 3 x 7 x 7 / 2 x 2
Solve the euqation.

Correct Option: C

√110¹/4
Multiply the denominator 4 with 100 and add the numerator 1.
= √441 / 4
Simply the number in simple multiplication
= √3 x 3 x 7 x 7 / 2 x 2
= 3 x 7/2 = 21/2
= 10.5

21600 = 6 x 6 x 6 x 10 x 10
To, make the given number a perfect cube, it must be multiplied by 10.

Correct Option: B

21600 = 6 x 6 x 6 x 10 x 10
To, make the given number a perfect cube, it must be multiplied by 10.