Question

Garrison of 120 man has a provision for 30 days at the end of 5 days 5 more men joined them how many days can they sustain on the remaining provinces

Answer 1

As per the situation , at the time of joining of 5 men ,120 men had provision for (30–5) = 25 days.

If men are changed N times, days will change by (1/N) times.

120N = 125 => (1/N) = 120 / 125.

(1/N) of 25 = (120/125)*25 = 24 days.