Multiple choice

Albert is a taxi driver and spends a total of $600 on petrol. Suddenly the prices of petrol are hiked and now for the same amount of money, he will get 4 gallons of petrol less than earlier. If the price of petrol was increased by 20%, then what is the amount by which the price of petrol increased per gallon?

  1. $4
  2. $5
  3. $6
  4. $8
  5. $10
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let P be the original price. 600/P - 600/(1.2P) = 4. 600/P - 500/P = 4. 100/P = 4, so P = 25. The new price is 1.2 * 25 = 30. The increase is 30 - 25 = 5.