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re: How much would 100lbs of potatoes @ 99% water weigh after they dry to 98% water?
Posted on 9/23/14 at 11:33 am to Pectus
Posted on 9/23/14 at 11:33 am to Pectus
quote:
Fred brings home 100 lbs of potatoes, which (being purely mathematical potatoes) consist of 99 percent water. He then leaves them outside overnight so that they consist of 98 percent water. What is their new weight? The surprising answer is 50 lbs.
Why?
quote:
100 lbs of potatoes, 99% water (by weight), means that there's 99 lbs of water, and 1 lb of solids. It's a 1:99 ratio.
If the water decreases to 98%, then the solids account for 2% of the weight. The 2:98 ratio reduces to 1:49. Since the solids still weigh 1 lb, the water must weigh 49 lbs.
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