Question

a military camp has provisions for 630 men to last for 25 days. how many men must be transferred to another camp so that the food lasts for 30 days

Answer 1

has provision for 630*25 days for one man.

for 30 day it shall be sufficient for (630*25)/30=525

i.e. 630-525=105 should be transferred.

Answer 2

25days =food for 630 men

30 days = x. (Inverse variation)

30*x = 630*25

x =630*25/30

x=21*25

x=525 men

(630-525)=105 ans