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In a store window, there was a box of berries having a total weight of 200 kg.  The berries were 99% water, by weight.  After two days in the sun, the water content of the berries was only 90%, by weight.  What was the total weight of the berries after two days, in kg?

 Jul 9, 2024
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In a store window, there was a box of berries having a total weight of 200 kg.  The berries were 99% water, by weight.  After two days in the sun, the water content of the berries was only 90%, by weight.  What was the total weight of the berries after two days, in kg?   

 

The water was 99% of 200, so the pulp was 1% of 200 = 2 kg.   

 

After two days in sun, 90% is water, but the pulp didn't evaporate.   

 

There's still 2 kg pulp, which now accounts for 10% of the berries.   

 

Since 10% is 2 kg, the total weight of the berries is now 20 kg.   

.

 Jul 9, 2024

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