Sabu, Pinki and Billu got Rs. 1600 for completing a work in 20 days. Sabu worked only 4 days and received Rs. 320 and Pinki and Billu worked all 20 days. If only Pinki and Billu were assigned to the same work for same money, then calculate the difference in Rs/day spent by payer in both the cases.
1
16
2
20
3
32
4
34
5
28