A contractor agreeing to finish a work in 150 days, employed 75 men each working 8 hours daily. After 90 days, only 2/7 of the work was completed. Increasing the number of men by­­ ________ each working now for 10 hours daily, the work can be completed in time.
Choose the correct choice from the following answers:
A) 140 workers
B) 150 workers
C) 160 workers
D) 155 workers
E) 130 workers
total man work in 90 days is = 90*75*8==&gt;54000 man work   remaining work =1-2/7=5/7   now, 2/7 work have 54000 man work   5/7 work will have (54000*7/2)*5/7 ==&gt; 135000 man work   days left =60 and 10 hrs per day   so, no. of workers = 135000/(60*10)==&gt;225   this is total workers.   so, workers needed ==&gt;225-75= 
<gadget id="calculator">225-75</gadget>
<output>150</output>
150 workers   ANSWER:150 workers
<result>B</result>
A contractor agreeing to finish a work in 150 days, employed 75 men each working 8 hours daily. After 90 days, only 2/7 of the work was completed. Increasing the number of men by­­ ________ each working now for 10 hours daily, the work can be completed in time.