A camp having 80 intimates, has food sufficient for 70 days. How many inmates should leave after 10 days so that the remaining food last another 80 days?
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20 will be the answer.
.
There are 80 x 70 = 5600 unit food
They ate it for 10 days 80 x 10 =800
Remaining food 5600-800 =4800
Remaining food last for 80 days.
No. Of inmates = 4800/80
=60
Therefore 80-60 =20 inmates left after 10 days
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