CrazyEngineers Archive

Old, but evergreen and popular discussions on CrazyEngineers, presented to you in read-only mode.

@csiscool • 21 Feb, 2010

Next door to me live four brothers of different heights. Their average height is 74 inches, and the difference-in height amongst the first three men is two inches. The difference between the third and fourth is six inches. Can you tell how tall is each brother?

PS: Post detailed solution

PS: Post detailed solution

@sookie • 21 Feb, 2010 • 1 like

C1(Condition 1): difference-in height amongst the first three men is two inches

C2(Condition 2): difference between the third and fourth is six inches

Average height= 74

Let first man's height= x

Second man's height= x+2 (as per C1)

Third man's height= (x+2)+2= x+4 (as per C1)

Fourth man's height= (x+4)+ 6 = x+10(as per C2)

Average = (First man's height+ Second man's height+ Third man's height+ Fourth man's height)/Total no of men

Average = (x+(x+2)+(x+4)+(x+10))/4 = 74

Solving it we get x=70

so now

First man's height= 70

Second man's height= x+2 = 70+2=72

Third man's height= x+4 = 70+4= 74

Fourth man's height= x+10 = 70+10=80

Was this so simple or still any other thing for puzzling us is there 😔 ..Please tell

**Given :**C1(Condition 1): difference-in height amongst the first three men is two inches

C2(Condition 2): difference between the third and fourth is six inches

Average height= 74

**Solution:**Let first man's height= x

Second man's height= x+2 (as per C1)

Third man's height= (x+2)+2= x+4 (as per C1)

Fourth man's height= (x+4)+ 6 = x+10(as per C2)

Average = (First man's height+ Second man's height+ Third man's height+ Fourth man's height)/Total no of men

Average = (x+(x+2)+(x+4)+(x+10))/4 = 74

Solving it we get x=70

so now

First man's height= 70

Second man's height= x+2 = 70+2=72

Third man's height= x+4 = 70+4= 74

Fourth man's height= x+10 = 70+10=80

Was this so simple or still any other thing for puzzling us is there 😔 ..Please tell

@sherya mathur • 22 Feb, 2010
lets the height of third person is=x

therefore the height of the forth person will be=x-6

from the first condition

the second person will be=x+2

the first person will be=x+4

given average height=74

hence total height will be =74 x4=296

which will be equal to

(x+4)+(x+2)+(x)+(x-6)=296

4x=296

x=74

therefore answers are

first=78

second=76

third=74

fourth=68

therefore the height of the forth person will be=x-6

from the first condition

the second person will be=x+2

the first person will be=x+4

given average height=74

hence total height will be =74 x4=296

which will be equal to

(x+4)+(x+2)+(x)+(x-6)=296

4x=296

x=74

therefore answers are

first=78

second=76

third=74

fourth=68

10.3k views

## Related Posts

@Kaustubh Katdare · Jan 27, 2011

With the number of engineering colleges mushrooming in every part of India...and each one of them trying to host their own tech-fest, it's become more harder than ever to come...

114.5k views

@vvishwaskumar · Nov 19, 2009

hi
i have a bicycle having a load of 100 kg acting on it. I have to calculate the starting torque, to propell the bicycle, either on the wheel or...

17.5k views

@Ankita Katdare · Oct 16, 2014

As was expected, India Kawasaki Motors (IKM) has launched its two new naked street bikes named Kawasaki Z250 and Kawasaki ER-6N in the country. The much-awaited bikes are among the...

4.9k views

@Abhishek Rawal · Apr 13, 2014

I am looking for list of reputed colleges in India that provides Embedded Systems Course in M.Tech on basis of GATE Score.
I recently checked Nirma University & it's ES...

16k views

@zaveri · May 12, 2013

What is the difference between static and stagnation properties involved in any thermodynamic cycle ?
for example , what is meant by static pressure and stagnation pressure ?

8.7k views