Question

a garrison of 120 men has provision for 30 days . at the end of 5 days . five more men joined them . how many days they can sustain on the remaining provision.????

Answer 1

total work =man*day
total work=120*30=3600


1st 5day=5*120=600
2nd 5day=125*5=625
3rd 5 day=130*5=650
4th 5day=135*5=675
5 the 5day=700
add 5 site=3250

remaining work=3600-3250=350

Total work in 350/145=70/29
in day=2 12/29
total=27 12/29 day