GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
i dont know what im missing
[#permalink]
03 Jan 2017, 11:44
03 Jan 2017, 11:44
00:00
Question Stats:
50% (02:06) correct
50% (00:00) wrong based on 2 sessions
Show timer Statistics
in 750 gram of mixture of salt and water , there is 30% of water. how much water should be converted to steam so that water in the mix remains 25%?
i think the answer should be 11.25
bcas, 225gms is 30% of 750gms. 5% of 225gms is 11.25gms which should be evoporated.
But the answer is 50gms.
what am i missing?
Brief me, if tthere is a concept behind this.
thanks.
i think the answer should be 11.25
bcas, 225gms is 30% of 750gms. 5% of 225gms is 11.25gms which should be evoporated.
But the answer is 50gms.
what am i missing?
Brief me, if tthere is a concept behind this.
thanks.
Re: i dont know what im missing
[#permalink]
03 Jan 2017, 13:40
03 Jan 2017, 13:40
2
Expert Reply
ssiva wrote:
in 750 gram of mixture of salt and water , there is 30% of water. how much water should be converted to steam so that water in the mix remains 25%?
i think the answer should be 11.25
bcas, 225gms is 30% of 750gms. 5% of 225gms is 11.25gms which should be evoporated.
But the answer is 50gms.
what am i missing?
Brief me, if tthere is a concept behind this.
thanks.
i think the answer should be 11.25
bcas, 225gms is 30% of 750gms. 5% of 225gms is 11.25gms which should be evoporated.
But the answer is 50gms.
what am i missing?
Brief me, if tthere is a concept behind this.
thanks.
Hi,
Rule: PERCENTAGES are not your friends
Now given that 750 gms of water contains 30% water or 30100×750 grams of water or 225 grams of water.
Let x grams of water be evaporated such that the solution now contains 25% water.
225−x750−x=25.
or 225−x750−x=14.
or (225−x)×4=750−x.
or 3x=150 or x=50 gms
Hence 50 grams of water needs to be evaporated.
Re: i dont know what im missing
[#permalink]
27 Oct 2021, 18:03
27 Oct 2021, 18:03
Hello from the GRE Prep Club BumpBot!
Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
