The ratio of three numbers is 1:2:5 and the sum of their squares is 4320. The sum of the numbers is?
Choose the correct choice from the following choices
A) A)10
B) B)12
C) C)15
D) D)14
E) E)9
Let the numbers be x,2x,5x   then, x^2+4x^2+25x^2 = 4320   30x^2 = 4320   x^2 = 144   x=12   Answer is 12
<result>B</result>
The ratio of three numbers is 1:2:5 and the sum of their squares is 4320. The sum of the numbers is?