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Question
In a mixture of petrol and Kerosene petrol is only 99 litres.
In a mixture of petrol and Kerosene petrol is only 99 litres.
if this same quantity of petrol would be presented in another mixture of petrol and Kerosene where total volume
would be 198 litres less than the actual mixture then the
concentration of petrol in the actual mixture would have
been 13.33% point less than that of the new mixture.
What is the concentration of petrol in actual mixture?
(a) 20%
(b) 16.66%
le) 26.66%
(d) 8.33%
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Answer
Hi
Let initial volume be V liters
Now petrol :99 and kerosene : V-99
Now when volume is 198 less than mixture
so we get V-198 as mixture volume
So by given condition :
Petrol volume : 99 and kerosene :V-297
Now by condition
(99/V-198) *100 -40/3 =(99/V)(100)
So we get
V(V-198)=495*297
So V =495
Therefore petrol concentration = (99/495)*100 =20
