Three numbers are in the ratio 3:5:7. The largest number value is 63. Find difference between Smallest & largest number is?  Choose the correct choice.
A) 20  B) 24  C) 30  D) 34  E) 36
== 3:5:7   Total parts = 15   = The largest number value is 63   = The largest number is = 7   = Then 7 parts -----&gt; 63 ( 7 * 9 = 63 )   = smallest number = 3 &amp; Largest number = 7   = Difference between smallest number &amp; largest number is = 7 - 3= 
<gadget id="calculator">7 - 3</gadget>
<output>4</output>
4= Then 4 parts -----&gt; 36 (4 * 9 = 36)   36
<result>E</result>
Three numbers are in the ratio 3:5:7. The largest number value is 63. Find difference between Smallest & largest number is?