Question

In a fort,360 men had provisions for 21 days. If 60 more men join them,how long will the provisions last

Answer 1

Answer:

It's a problem of indirect variation

more person, provision of food for less days

$\frac{number \: of \: persons}{number \: of \: days} = \frac{360}{21} = \frac{420}{x} \\ 360 \times 21 = 420 \times x \\ x = 18$

Answer 2

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