Posted by siddharth on Saturday, February 16, 2013 at 4:29am.
the hostel of a college having 320 students has a stock of food for 80 days if 20 students leave the hostel after 20 days for how many more days will the food last?

math  Anonymous, Saturday, January 18, 2014 at 8:39am
x/y is equal to students/days.
Therefore,320students/60 days is equal to 300 students / y days.
It is indirect variation.
320× 60= 300y
you = 320/300×60 =64 days.
Hence the food will last more 4 days