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A ship has wrecked and its crew of 300 men has been left stranded on a dessert island. The food will last for 90

A ship has wrecked and its crew of 300 men has been left stranded on a dessert island. The food will last for 90 days. After 20 days, 50 men have been rescued by air and left the island. How long would the food last at the same rate?

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Total food present with the crew is X 300 90 27000 ... blur-text-image

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