An empty fuel tank to a car was filled with A type of petrol. When the tank was half empty, it was filled with B type of petrol. Again when the tank was half empty, it was filled with A type of petrol. When the tank was half empty again,it was filled  Pick one:
A) 50%	B) 40%	C) 33.5%	D) 37.5%	E) None of these
Now, amount of petrol A = A⁄4 + A⁄8 = 3A⁄8   ∴ required% = 3A⁄ (8 × A) × 100 = 37.50%   Answer 37.5%
<result>D</result>
An empty fuel tank to a car was filled with A type of petrol. When the tank was half empty, it was filled with B type of petrol. Again when the tank was half empty, it was filled with A type of petrol. When the tank was half empty again,it was filled