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Fraction - cafeteria

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by pullagurla » Wed Jul 14, 2010 10:16 am
If a school cafeteria needs 'C' cans of soup each week for student and if there are 'S' students in the school , for how many weeks will ' x ' cans of soup last ?
a.CSx
b.xS/C
c.S/Cx
d.x/CS
e.Cx/S
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by kvcpk » Wed Jul 14, 2010 10:22 am
pullagurla wrote:If a school cafeteria needs 'C' cans of soup each week for student and if there are 'S' students in the school , for how many weeks will ' x ' cans of soup last ?
a.CSx
b.xS/C
c.S/Cx
d.x/CS
e.Cx/S
C for each week
S students
how many weeks will x last?
let the number of weeks be w.
for each week, there will be x/w cans of soup.

Each student will take C cans of soup
So S students wiltake SC cans
we know x/w = sC
w= x/SC

pick D
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