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16 Jul 2018, 09:32
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B
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Difficulty:
45%
(medium)
Question Stats:
66% (01:51) correct
34%
(01:57)
wrong
based on 430
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100 grams Rosewater is 99% water by weight. After some of the water evaporates, the rosewater is now 98% water by weight. What is the new weight of the rosewater, in grams?
A) 2
B) 50
C) 92
D) 96
E) 98
A) 2
B) 50
C) 92
D) 96
E) 98
16 Jul 2018, 10:13
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Harshgmat
100gms rosewater..
99% water means 99gm water and remaining 1gm is other part/rose
Now when water evaporates and 99% water becomes 98%, the other part becomes 2% but the weight remains 1gm..
So 2% of rosewater now =1gm
Or 100%=100*1/2=50gm
B
16 Jul 2018, 10:32
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Harshgmat
100 gms contains 99 gms water & 1 gms of rose essence
After evaporation of water let X be the weight of rose water
The rose essence is now 2%, hence, we have 1 = (2/100)* X
Solving we get, X = 50 gms
Answer B.
Thanks,
GyM
