If b can complete the work in n days and if a and b can work together then they will complete in y days. what will be time to complete the work a alone?	Select the correct option:
A) (n-y)/yn	B) 1/yn	C) yn/(n-y)	D) 2^(yn/(n-y))	E) cannot be determined
option C is answer.   one day work of b =1/n.   a+b=1/y(one day work)   a=(1/y)-b   =(1/y)-1/n   =(n-y)/yn(one day work of a)   No of days =yn/(n-y)
<result>C</result>
If b can complete the work in n days and if a and b can work together then they will complete in y days. what will be time to complete the work a alone?