Question

Raja can build a structure in 15 days shakir can build the same structure in 18 days both raja and shakir start making the structure but shakir goes after 6 days of work how many days would be needed by raja to complete the structure

Answer 1

Raja can build a structure in 15 days
1 day work of Raja =1/15
Shakir can build the structure in 18 days
1 day work of Shakir = 1/18
1 day work of Raja and Shakir together = 1/15 + 1/18 = 6+5/90 = 11/90
6 days work of Raja and Shakir together (Completed work) = 11/90×6 = 11/15
Remaining work = 1-(11/15) = 4/15
No. of days to complete remaining work = Remaining work / 1day work of Raja = 4/15 - 1/15 = 3/15 = 1/5

The remaining work will be completed by Raja in 5 days

Answer 2

Answer:

1/15 +1/18=11/90.so ,.11/90×6=11/15 remain work =1-11/15=4/15 4/15-1/5 ans =5