a family of 6 people have enough stock of grain to last for 40days.Due to the arrival of some relatives the food was consumed in 30days .how many guests joined the family?
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6 × 40 = 30 × ( guest + family members )
( guest + family member) = (6×40)/30
( guest+ family member ) = 8
guest = 2
( guest + family member) = (6×40)/30
( guest+ family member ) = 8
guest = 2
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