RRB NTPC CBT I 8 Jan 2021 Shift 2 Paper

Question : 5 of 100

Marks: +1, -0

A alone can complete a work in 10 days and B can complete it in 15 days. A and B undertake the work for Rs. 4,800. With the help of C, they complete the work in 5 days. What amount is to be paid to C?