Question
A petrol pump has a blend of 40 liters of petrol and
diesel in the ratio of 5:3. After selling 16 liters of the mixture, 12 liters of petrol are added to the remaining mixture. Subsequently, 20 liters of the mixture are sold, and then 8 liters of petrol are added. What percentage of the final quantity of petrol is the final quantity of diesel?Solution
ATQ, Petrol in 40 liters = (5/8) × 40 = 25liters Diesel in 40 liters = (3/8) × 40 = 15 liters Petrol in 16 liters = 16 × (5/8) = 10 liters Diesel in 16 liters = 16 × (3/8) = 6 liters After adding 12 liters Now Petrol quantity = 25 – 10 + 12 = 27 liters Diesel quantity = 15 – 6 = 9 liters Now the ratio of petrol and diesel= 27:9 = 3:1 petrol in 20 liters = 20 × (¾) = 15 liters Water in 20 liters = 20 × (¼) = 5 liters Final petrol quantity = 27 – 15 + 8 = 20 liters diesel quantity = 9 – 5 = 4 liters Required percentage = (4/20) × 100 = 20%
A 100 μF capacitor is charged to a voltage of 50V. How much energy is stored in the capacitor?
What is the unit of the refractive index?
The mass and energy equivalent to 1 a.m.u. respectively are -
Which type of mirror is used in car headlights?
The electric and magnetic fields of an electromagnetic wave are _____________
Which law states that the total current entering a junction is equal to the total current leaving the junction?
A solid non-conducting sphere of radius R carries a uniform volume charge density ρ. What is the ratio of electric field at r = R (surface) to that at ...
Compared to fresh Water, the freezing point of sea water is -
Water flows in a horizontal pipe of non-uniform area of cross-section at a pressure difference of 1.6 cm of mercury. If the velocity of water at the la...
The refractive index of glass is 1.5. What is the speed of light in glass?
(Speed of light in vacuum is 3.0 ×108 m s-1)
