Divide 64*5^(1/2) by 3*5^(1/2).

Question

Divide  6\sqrt{45}  by  3\sqrt{5} .

(A) 4 
(B) 6 
(C) 9 
(D) 15 
(E) 54

GMATinsight · Answer

6\sqrt{45}  /  3\sqrt{5}  =  6\sqrt{9}\sqrt{5} / 3\sqrt{5}

= 6*3 / 3 = 6

Answer: option B

Abhishek009 · Answer

\frac{6√ 45}{3√ 5}

Or,  \frac{18√5}{3√ 5}

Or, 6 , Answer must be (B)

JeffTargetTestPrep · Answer

(6√45)/(3√5) = 2√9 = 2 x 3 = 6

Answer: B

KS15 · Answer

=18\sqrt{5}/3\sqrt{5}
=6
Answer B

US09 · Answer

IMO B. But the OA is E!! Can anyone explain?

Bunuel · Answer

Edited. Thank you.

Divide 645^(1/2) by 35^(1/2).