use Identity,
12) There are 100 students in a hostel. Food provision for them is for 20 days
How many students join the hostel, if the provision last for 16 days
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Step-by-step explanation:
for more students food lasts for less days, for less students food lasts for more days
s, students and days,d are inversely proportional
s1*d1 = s2 * d2
100 × 20 = x × 16
2000/16 = x
x = 125 students
more 125-100 =25 students joined the hostel
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