Elitmus
Exam
Numerical Ability
Area and Volume
khali and bali are two bouncers working in D Bar.Salary of khali is 3 times that of bali.If suppose salary of khali increses by x% and salry of bali increases by y% then total combined salary increase is 5z%.If khali salary increses by y% and bali salary by x% then total combined salary increase is 3z%.find the ratio x:y
Read Solution (Total 4)
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- let assume khalli's salary=300 and bali's= 100
then according to question
300 * (1+x/100) + 100* (1+y/100) = 400 * (1+5z/100) ............................(1)
300 * (1+y/100) + 100* (1+x/100) = 400 * (1+3z/100) ............................(2)
rewriting equation 1 and 2
3x + y = 20z.....................(3)
and
x + 3y = 12z......................(4)
solve equation 3 and 4 ; you will get y=2z and x= 6z
so x:y= 3:1 - 9 years agoHelpfull: Yes(23) No(0)
- khali salary be K and bali salary be B .... & K=3B
xK/100+yB/100= 5z(K+B)/100
or
xK+yB=5z(k+B)
substituting K=3B
3x+y=4.5z------------1
yK/100+xB/100= 3z(K+B)/100
or
yK+xB=3z(k+B)
suibstituting K=3B
3y+x=3z.4--------------2
mutiply 1 by 3 and subtract 2
x=6z
multiply 2 by 3 and subtract 1
y=2z
x:y=3:1 - 9 years agoHelpfull: Yes(10) No(10)
- cannot be dertermined i think so
- 9 years agoHelpfull: Yes(2) No(4)
- rakesh bhai kaha ho solve kardo ise
- 9 years agoHelpfull: Yes(2) No(1)
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