16 welders work at a constant rate they complete an order in 8 days. If after the first day, 9 welders start to work on the other project, how many more days the remaining welders will need to complete the rest of the order?	Choose the correct option.
A) 5  B) 2  C) 8  D) 4  E) 16
1. We need to find out the time taken by 7 workers after day 1.   2. total no.of wokers * total time taken = time taken by 1 worker   3. Time taken by 1 worker = 16*8= 
<gadget id="calculator">16*8</gadget>
<output>128</output>
128 days   4. But on day 1 sixteen workers had already worked finishing 1/8 of the job. So 7 workers have to finish only 7/8 of the job.   5. Total time taken by 7 workers can be got from formula used at (2). i.e., 7* total time taken= 128. Total time taken by 7 workers to finish the complete job is 128/7 = 18.286 days.   6. Time taken by 7 workers to finish 7/8 of the job is 7/8 * 18.286 = 16 days.   The answer is choice 16
<result>E</result>
16 welders work at a constant rate they complete an order in 8 days. If after the first day, 9 welders start to work on the other project, how many more days the remaining welders will need to complete the rest of the order?