A garrison has provisions for 120 men for 15 days . If 30 more person join the garrison, how long will the provision last?
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Total provisions = 120 men x 15 days
If 30 persons added (total 150 men) it will last for 'X' days
Since provision remain same
150 x X = 120 x 15
X = 120 x 15 / 150
X = 120/10
X = 12 Days
Provision last for 12 days.
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