8 men can dig a pit in 20 days. If a work half as much again as a boy, then 4 men and 9 boys can dig a similiar pit. Find the days for 15 days can dig?	Select the correct option:
A) 20 B) 14 C) 16 D) 10 E) 21
1 man=3/2 boys.   (4 men +9 boys)=15 boys.   8men=(3/2)*8= 
<gadget id="calculator">(3/2)*8</gadget>
<output>12</output>
12 boys.   now, 12 boys can dig the bit in 20 days.   15 boys can dig=20*12/15= 
<gadget id="calculator">20*12/15</gadget>
<output>16</output>
16 days.   The option 16 is answer
<result>C</result>
8 men can dig a pit in 20 days. If a work half as much again as a boy, then 4 men and 9 boys can dig a similiar pit. Find the days for 15 days can dig?