Question

a mixture of petrol and kerosene oil contains 89% petrol the amount of kerosene oil in 250 litres mixture is

Answer 1

kerosene oil contains= (100-89)% = 11%

so in 250 litres mixture kerosene's amount is =250×11/100 =27.5 ltrs

Answer 2

The amount of kerosene in the mixture is 27.5 litres.

• A mixture of kerosene and petrol oil contains 89% petrol.
• Therefore remaining percentage of oil is kerosene.
• Remaining percentage of oil = 100-89 = 11%
• Now total amount of oil is 250 litres.
• Now the amount of kerosene in the oil is 11% of 250 litres.

Amount of kerosene in the oil = 0.11 × 250 = 27.5 litres.