If 3 persons can do 3 times of a particular work in 3 days, then, 7 persons can do 7 times of that work in ? Choose the correct choice from the following options:
A) 3 days	B) 4 days	C) 4 days	D) 6 days	E) 7 days
That is, 1 person can do one time of the work in 3 days.   Therefore, 7 persons can do 7 times work in the same 3 days itself.   Option '6 days'
<result>D</result>
If 3 persons can do 3 times of a particular work in 3 days, then, 7 persons can do 7 times of that work in ?