Latest Tech Mahindra Aptitude Question SOLUTION: An oil of Rs.42 per kg is mixed with 10 kg oil of Rs.69 per kg. If price of mixture oil is Rs.60 per kg then what is the quantity of first type of oil in the mixture? a) 6 kg b)

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An oil of Rs.42 per kg is mixed with 10 kg oil of Rs.69 per kg. If price of mixture oil is Rs.60 per kg then what is the quantity of first type of oil in the mixture?

a) 6 kg
b) 5 kg
c) 8 kg
d) 4 kg

Asked In Tech Mahindra Aashu (8 years ago)

Unsolved Read Solution (3)

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Read Solution (3) :

ajay  (8 years ago)

ans - b)
let X be the first type of oil
((x*42)+(10*69))/(x+10)=60 by solvig the equation we get x=5

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chaan  (7 years ago)

ANSWER : 5(B)
use allegation and mixture concept
42 69
60
9(69-60) 18(60-42)

so.. 1st:2nd ==> 9:18 ==> 1:2 . so if second is of 10 liters then first one will be of 5 liters.

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Shalu  (7 years ago)

Rule of Mixture
(Quantity of cheaper/Quantity of dearer)=(C.P fo dearer)-(mean price)/(mean price)-( C.P of cheaper)
let quantity of cheaper=x
Quantity of dearer=10 kg
C.P fo dearer=69
mean price=60
C.P of cheaper=42
x/10 =(69-60)/(60-42)
x/10=9/18
x=90/18
so x=5kg
Ans=B

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