SOLUTION: twelve people purchased supplies for a ten-day camping trip with the understanding that each of the twelve will get equal daily shares .they are then joined by three more people ,

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Question 319445: twelve people purchased supplies for a ten-day camping trip with the understanding that each of the twelve will get equal daily shares .they are then joined by three more people , but make no further purchases . how long will the supplies then last if the original daily share for each person is not changed ?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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twelve people purchased supplies for a ten-day camping trip with the
understanding that each of the twelve will get equal daily shares .
they are then joined by three more people , but make no further purchases .
how long will the supplies then last if the original daily share for each person is not changed ?
:
We can use a man-day ration (mdr) method
12 men, 10 days, require: 12 * 10 = 120 mdr's were purchased
:
let d = no. of days for 15 men
:
15d = 120
d = 120%2F15
d = 8 days