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.
In the formula F
[#permalink]
01 Aug 2021, 21:15
01 Aug 2021, 21:15
Expert Reply
00:00
Question Stats:
83% (00:43) correct
16% (00:38) wrong based on 37 sessions
Hide Show timer Statistics
In the formula \(F=\frac{1}{(3k)^3}\), if k is halved , the F is multiplied by
A. 27
B. 8
C. 1
D. 1/8
E. 1/27
A. 27
B. 8
C. 1
D. 1/8
E. 1/27
In the formula F
[#permalink]
01 Aug 2021, 23:08
01 Aug 2021, 23:08
2
Solution:
Substituting K= 1, will help us to easily solve this question
F= \(\frac{1}{{3k}^3}\)=\(\frac{1}{27}\)
Now, when K is halved, 1 will become 1/2
Thus, we get \(\frac{1}{{(3*1/2)}^3}\)=\(\frac{ 1}{27/8}\)= \(\frac{8}{27}\)
Thus for the original value of F this value has 8 in the numerator, which we get if we multiply F by 8
i.e. 8F\(= \frac{1}{{(3K/2)}^3}\)
IMO B
Hope this helps!
Substituting K= 1, will help us to easily solve this question
F= \(\frac{1}{{3k}^3}\)=\(\frac{1}{27}\)
Now, when K is halved, 1 will become 1/2
Thus, we get \(\frac{1}{{(3*1/2)}^3}\)=\(\frac{ 1}{27/8}\)= \(\frac{8}{27}\)
Thus for the original value of F this value has 8 in the numerator, which we get if we multiply F by 8
i.e. 8F\(= \frac{1}{{(3K/2)}^3}\)
IMO B
Hope this helps!
gmatclubot
In the formula F [#permalink]
01 Aug 2021, 23:08
Moderators:
