Latest TCS Aptitude Question SOLUTION: In a group of cows and ducks, the number of legs are 24 more than twicw thw number of heads the total number of cows are

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In a group of cows and ducks, the number of legs are 24 more than twicw thw number of heads the total number of cows are

Asked In TCS karthika (6 years ago)

Unsolved Read Solution (6)

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Subhraneel Dey  (6 years ago)

let the no of cows be x & no of ducks be y.
therefore,

also need to remember cows have 4 legs & ducks have 2.

4x+2y=2*(x+y)+24
4x+2y=2x+2y+24
2x=24
x=12.

Is this solution Helpfull? Yes (15) | No (4)  

vishaldeep  (6 years ago)

Legs = 24 + 2 *heads --------(1)
Cows have 4 legs and ducks have 2 legs
so legs = 4 cows + 2 ducks ------(2)
Both Cow and Duck have one head
so head= cow + duck------(3)
Use 2 and 3 in (1)
4 cows + 2 ducks= 24 + 2* (cow + duck)
2 cows =24
cows =12

thus number of cows will be 12

Is this solution Helpfull? Yes (5) | No   

  (6 years ago)

l=4c+2d
h=c+d
from given data
l=2h+24
so
4c+2d=2c+2d+24
c=12
number of cows c=12

Is this solution Helpfull? Yes (1) | No   

kalyankalluri  (6 years ago)

4X+2Y= 2(X+Y)+ 24 @@@ 2X=24 @@ X=12

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Affnan  (6 years ago)

l=4c+2d--->1
h=c+d------>2
from given problem
l=2h+24----->3
from 1 & 2
4c+2d=2c+2d+24
2c=24
c=12

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teja  (6 years ago)

Let "L" = total # of legs.
Let "H" = total # of heads.
--------------------------------
L = 2H + 24
---
# of legs = 4c + 2d where c = # of cows and d = # of ducks
# of heads = c + d

Now
H=c+d
L=4c+2d
--------------------
Equations:
Since L = 2H + 24,
4c + 2d = 2(c+d) + 24
4c+2d = 2c+2d+24
--
2c = 24
C = 12 (# of cows)

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