An empty fuel tank of a car was filled with A type petrol. When the tank was half-empty, it was filled with B type petrol. Again when the tank was half-empty, it was filled with A type petrol. When the tank was half-empty again, it was filled with B type petrol. What is the percentage of A type petrol at present in the tank?
A. 33.5%
B. 37.5%
C. 40%
D. 50%
Answer: Option B
Solution(By Examveda Team)
Let the capacity of the tank be 100 litres Initially: A type petrol = 100 litres After first operation: A type petrol = $$\frac{{100}}{2}$$ = 50 litres B type petrol = 50 litresAfter second operation: A type petrol = $$\frac{{50}}{2}$$ + 50 = 75 litres B type petrol = $$\frac{{50}}{2}$$ = 25 litres After third operation: A type petrol = $$\frac{{75}}{2}$$ = 37.5 litres B type petrol = $$\frac{{25}}{2}$$ + 50 = 62.5 litres Required percentage = 37.5%
Related Questions on Percentage
A. $$\frac{1}{4}$$
B. $$\frac{1}{3}$$
C. $$\frac{1}{2}$$
D. $$\frac{2}{3}$$
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