45 men can complete a work in 18 days. Six days after they started working, 30 more men joined them. How many days will they now take to complete the remaining work?
Select:
A) 6.6	B) 10	C) 15	D) 7.2	E) 8
45*18 men can complete the work in 1 day   1 man's 1 day work = 1/810   45 men 6 days work = 6*1/18 = 1/3   remaining work = 1-1/3 = 2/3   75 men's 1 day's work = 75/810 = 5/54   2/3 work is done by them in  54/5 * 2/3= 
<gadget id="calculator"> 54/5 * 2/3</gadget>
<output>36/5 = around 7.2</output>
7.2 days   Answer is 7.2
<result>D</result>
45 men can complete a work in 18 days. Six days after they started working, 30 more men joined them. How many days will they now take to complete the remaining work?