In a store window, there was a box of berries having a total weight of 200 kg. The berries were 98% water, by weight. After two days in the sun, the water content of the berries was only 95%, by weight. What was the total weight of the berries after two days, in kg?
In a store window, there was a box of berries having a total weight of 200 kg. The berries were 98% water, by weight. After two days in the sun, the water content of the berries was only 95%, by weight. What was the total weight of the berries after two days, in kg?
You're starting with 200 kg of berries, and 98% of that is water.
Since they're 98% water, that means that there's 2% of solid stuff.
2% of 200 kg means that there are 4 kg of solid stuff.
Some of the water evaporates in the sun, but the solid stuff doesn't.
So, after the evaporation, there still remains the same 4 kg of solid stuff.
Since the new water content is 95%, that means that now the solid stuff is 5%.
So 2 kg (the solid stuff) is 5% of the total weight.
That means the new total weight is 40 kg.
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