Multiple choice general knowledge math & puzzles

There are 4 quarts in a gallon. A gallon of petrol sells for Rs.12 and a quart of the same petrol sells for Rs.5. The owner of a rental agency has 6 machines and each machine needs 5 quarts of petrol. What is the minimum amount of money he must spend to purchase enough petrol?

  1. Rs 84

  2. Rs 94

  3. Rs 96

  4. Rs 102

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total needed: 30 quarts. Buying 7 gallons (28 quarts) for 7*12=84 plus 2 individual quarts for 2*5=10 equals 94. Buying 8 gallons (32 quarts) costs 96. 94 is the minimum.