If 5400 mn = k^4, where m, n, and k are positive integers, what is the least possible value of m + 2n? Choose the correct choice.
A) 11	B) 18	C) 20	D) 25	E) 40
k^4=5400∗mn   k^4=3^3.2^3.5^2.mn   In order to make RHS a perfect power of 4, we require it to be multiplied by 3, 2 &amp; 5^2   mn=3.2.5^2   mn = 150 = 10 * 15 (Least possible)   Answer = 10 + 15*2= 
<gadget id="calculator">10 + 15*2</gadget>
<output>40</output>
40   ANSW40R:40
<result>E</result>
If 5400 mn = k^4, where m, n, and k are positive integers, what is the least possible value of m + 2n?