Civil Engineering - Concrete Technology - Discussion

35. 

The percentage of the aggregate of F.M. 2.6 to be combined with coarse aggregate of F.M. 6.8 for obtaining the aggregates of F.M. 5.4, is

[A]. 30%
[B]. 40%
[C]. 50%
[D]. 60%.

Answer: Option C

Explanation:

No answer description available for this question.

Pratik Basak said: (Jan 3, 2015)  
Formula is (X-Z)/(Z-Y)*100.
Here X - 6.8, Y - 2.6, Z - 5.4.

Agar said: (Dec 8, 2015)  
FM mean?

Rajesh said: (Jan 26, 2016)  
Fineness Modulus-FM.

Nabin Chandra Das From Gimt said: (Jan 27, 2016)  
{(6.8-5.4)/(5.4-2.6)}*100 = 50%

x = 6.8, y = 2.6, z = 5.4.

C is correct answer.

Amrit Raj said: (Mar 18, 2017)  
How can we determine the value of X, Y and Z?

Vishvas said: (Jun 3, 2017)  
X = % coarse aggregates.
Y = % fine aggregates.
Z = % combined aggregates.

Pritam said: (Sep 28, 2017)  
When it is given "to be combined", the solution is given as (6.8-5.4)/(6.8-2.6).

Naveen Kallan said: (Oct 9, 2017)  
If it is the ratio of fine to coarse then only ans is 50%.

If it is percentage then ans is X-Z/X-Y = 33.33%.

Rabindra said: (Apr 18, 2018)  
Nice @Pratik.

Vikrantsinghchauhan said: (Sep 24, 2018)  
I am not understanding. Please explain the correct answer of this question.

Vivek Yadav said: (Oct 8, 2018)  
50% is correct.

Mrityunjoy Mete said: (Nov 16, 2018)  
the fine aggregate of finesse modulus 2.6 is mix with a coarse aggregate of finesse modulus 6.8 for obtaining the aggregate of finesse modulus 5.4 then find our the percentage of coarse aggregate in the mix?

Can anybody answer this?

Gopal said: (Jun 11, 2019)  
Yes, you are right, Thanks @Naveen Kallan.

Chintu said: (Jul 21, 2019)  
Agree @Naveen Kallan.

The Answer is 33.33%.

Chintu said: (Jul 21, 2019)  
Let the proportion of FA is =p.

Then, proportion of CA will be =1-p , as sum of proportion is always 1.
So, 2.6p+6.8(1-p)=5.4 , by solving it we get, p=1/3=0.33, i.e in percentage it is 33.33% .
But in option appropriate answer will be 30%.

Anoms said: (Aug 15, 2019)  
(coarse -Combine)/(Combine-Fine) * 100.
So, (6.8-5.4)/(5.4-2.6)*100 = 50%.

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