birdwatcher (birdwatcher) wrote,

Математика интервью

Дети принесли из Дворца пионеров:
6. An apple is floating in the pond. Its density is such that 1/5 of it is above water, and 4/5 is in the water. A fish nibbles at the immersed part of the apple at a rate of 60 g/min, while a bird is picking at the part that is in the air at a rate of 120 g/min. What proportion of the apple will be eaten by the bird and what by the fish?

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