45 men can complete a work in 19 days. Six days after they started working, 30 more men joined them. How many days will they now take to complete the remaining work?
Choose the correct option:
A) 6.2
B) 10
C) 15
D) 7.8
E) 8
45*19 men can complete the work in 1 day   1 man's 1 day work = 1/855   45 men 6days work = 6*1/19 =6/19   remaining work = 1-6/19 = 13/19   75 men's 1 day's work = 75/855 = 5/57   13/19 work is done by them in  57/5 * 13/19= 
<gadget id="calculator"> 57/5 * 13/19</gadget>
<output>39/5 = around 7.8</output>
7.8days   Answer is 7.8
<result>D</result>
45 men can complete a work in 19 days. Six days after they started working, 30 more men joined them. How many days will they now take to complete the remaining work?