Question

There are 120 students in a hostel. Food provision for them is for 25 days. How long will these provisions last, if 20 students leave the group?

Answer 1

Answer:

First( 120 students)×(20days)= total food eaten.—(1)

Now there are 100+25 students.

So, (125 students)×(x days)= total food eaten.—(2)

From 1 and 2

(125 students)×(x days)= ( 100 students)×(20days)

x days = {( 100 students)×(20days)}/125 students

x days = (4×20)/5= 4×4= 16.

Hence total days = 16.