Correct Answer - Option 1 : 30
From the table
In every condition,
Expenditure of an automobile owner per month
Expenditure in first condition = 40 × 60 = Rs 2400
Expenditure in 2nd condition = 50 × 48 = Rs 2400
Expenditure in 3rd condition = 60 × 40 = Rs 2400
Expenditure in 4th condition = 75 × 32 = Rs 2400
so, If price goes up to Rs 80 per litre, expenditure is same in all condition
let consumption of petrol be x
⇒ 80 × x = 2400
⇒ x = 30 litres
∴ The required answer is 30 litres