Potatoes
are made up of 99% water and 1% "potato matter." Jack bought 100
pounds of potatoes and left them outside in the sun for a while. When he
returned, he discovered that the potatoes had dehydrated and were now only
made up of 98% water. How much did the potatoes now weigh?
Solution follows here:
Key point to be noted here is:
(A) 98
pounds
(B) 99 pounds
(C) 90 pounds
(D)
50 pounds
Solution:
Initially,
weight of water 99% and of potatocontent is 1%
ð Out
of a total weight of 100 pounds, weight of water is 99 pounds and weight of
potatocontent is 1 pound.
After
dehydration, let the total weight be ‘x’.
Total weight

Weight of water

Weight of “potato content”


Initially

100

99

1

After
Dehydration

x

0.98 * x

0.02 * x

“After
dehydration, weight of potato content does not change”
0.02 * x = 1
x = 1/0.02 = 100/2 = 50
Answer is (D)
Nice one sir.....
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