A carpenter can produce 10 chair in 5 days ,b can produce 10 chair in 5 days and c can produce 20% faster than a and b. Approximately how many days would it take to produce a 100 chairs with all three carpenter working simultaneously? Choose one
A) 16 B) 17 C) 15 D) 10 E) 20
since c is 20% faster , thus it will create 12 chair in 5 days.   in 5 days total number of hubcaps made by all three will be :   10+10+12= 
<gadget id="calculator">10+10+12</gadget>
<output>32</output>
32   in 10 days:   32+32= 
<gadget id="calculator">32+32</gadget>
<output>64</output>
64   in 15 days:   64+32= 
<gadget id="calculator">64+32</gadget>
<output>96</output>
96   now only 4 more chairs are required , which will take 2 days   thus in all 17 days.   Ans:17
<result>B</result>
A carpenter can produce 10 chair in 5 days ,b can produce 10 chair in 5 days and c can produce 20% faster than a and b. Approximately how many days would it take to produce a 100 chairs with all three carpenter working simultaneously?