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18 March, 20:36

A refrigerator cools a bottle of water 2 degrees per minute. how many minutes will it take to lower its temperature from 90 degrees to 50 degrees?

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  1. 18 March, 20:59
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    It will take 20 minutes. The fridge needs to cool down by 90-50=40degrees. The fridge cools at 2 degrees per minute, i. e. 40/2=20 minutes total.
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