18kg of fresh grapes have 90% water. Dry grapes have 20% water then the weight of the dry grapes is?

2.25kg

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Visitor

  • Oct 22nd, 2006
 

can u plz explain?

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jaymrms

  • Jan 30th, 2008
 

I think Answer is 4 kg
If Grapses having 90% water then its weight is 18
then if it has 20% water then ...??
 = 20*18/90 = 4kg

Please Correct it if i make any mistak.

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rock_akhil

  • May 8th, 2010
 

Answer is 2.25 kg

Weight of Grape when grapes are fresh is 10% of 18kg = 1.8 kg

Weight of Grape when grapes are dry is 80% of x kg.

Now, weight of grape in both cases is same, hence

80% of x = 1.8

=> x = 2.25 kg

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