+490 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 75%, by weight. What was the total weight of the berries after two days, in kg?
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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 75%, by weight.
What was the total weight of the berries after two days, in kg?
You start with 200 kg of berries, and 99% of that is water.
They're 99% water, which means there's 1% of solid stuff.
And 1% of 200 kg means there are 2 kg of the solid stuff.
Some of the water evaporates in the sun, but the solid stuff doesn't.
So, after this evaporation, there remains the same 2 kg of solid stuff.
Since the new water content is 75%, now the solid stuff composes 25%.
So 2 kg (the solid stuff) is (100% – 75% water) = 25% of the total weight.
That means the new total weight is (2 kg / 0.25) = 8 kg
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