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A car gives a mileage of 20 km per liter of petrol when driven at a constant speed of 50 kmph but the mileage decreases by 10% when driven at a speed of 70 kmph. How many km can the car travel with 12 liters of petrol if it travels a speed of 70 kmph?

Correct answer: A. 216 km

  • A. 216 km
  • B. 240 km
  • C. 228 km
  • D. 200 km

Explanation

At 70 km/h, the mileage falls by 10%, so it becomes 20 km/L x 90/100 = 18 km/L. With 12 L, the distance is 18 km/L x 12 L = 216 km; 240 km ignores the 10% mileage reduction.

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