a2zinterviews

21.	A man can do a piece of work in 5 days, but with the help of his son, he can do it in 3 days. In what time can the son do it alone?
	A.  6x1/2 days
	B.  7 days
	C.  7x1/2 days
	D.  8 days

Solution

Son's 1 day's work = (1/3-1/5) =2/15. The son alone can do the work in = 15/2 =7x1/2 days.

22.	A, B and C are employed to do a piece of work for Rs.529. A and B together are supposed to do 19/23 of the work and Band C together 8/23 of the work. What amount should A be paid?
	A.  Rs.315
	B.  Rs.345
	C.  Rs.355
	D.   Rs.375

Solution

Work done by A =(1 - 8/23) = 15/23 A : (B+C) =(15/23 : 8/23) = 15 : 8 So, A's share=Rs.(15/23 x 529) = Rs.345.