Multiple choice

Three utensils of 10 liters in which the ratio of petrol and kerosene is 2: 1, 3: 1, and 3: 2, respectively. If all the three utensils are given in a large pot, then find the ratio of petrol and kerosene in the new mixture?

  1. 79:86

  2. 85:78

  3. 59:121

  4. 121:59

  5. 78: 85
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Each utensil contains 10L total. Utensil 1 (ratio 2:1): petrol = 20/3 L, kerosene = 10/3 L. Utensil 2 (ratio 3:1): petrol = 15/2 L, kerosene = 5/2 L. Utensil 3 (ratio 3:2): petrol = 6 L, kerosene = 4 L. Total petrol = 121/6 L, total kerosene = 59/6 L. Ratio = 121:59. Option A (79:86) reverses the order. Option B (85:78) and E (78:85) are miscalculated. Option C (59:121) reverses the correct ratio.

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