Ratio And Proportion Q19

19.A garrison has provisions for 120 soldiers for 240 days. After 180 days 60 more soldiers will join the group. For how many more days will the provisions last?

A.40                                                   B.80

C.20                                                   D.60

Soln:

Actually after 180 days,

If 120 members are there provisions come for 60 more days (since total 240 days)

But now 180 members are there.

So number of days = (120/180) X 60 = 40 days.