20 is to be divided into two parts such that the sum of 10 times the first and 22 times the second is 780. The bigger part is :
Choose the correct choice:
A) 33.33	B) 34.01	C) 26.32	D) 28.33	E) 19.21
Explanation:   Let the two parts be (20 - x) and x.   Then, 10 (20 - x) + 22x = 780   =&gt; 12x = 580   =&gt; x = 48.33.   Bigger part = (20 - x) = 28.33.   Answer: 28.33) 28.3
<result>D</result>
20 is to be divided into two parts such that the sum of 10 times the first and 22 times the second is 780. The bigger part is :