Question

Mr. phill stopped to fill his car with gas on the way to New York. It took 1 ¼ minutes to fill a 15 liters of gas in his tank. At this rate, how long will it take to fill his 50 liter gas tank?

Answer 1

• 4 1/6 min or 4 min 10 sec

Explanation:

Filling rate is:

• 15 ÷ 1 1/4 = 15 ÷ 5/4 = 15 × 4/5 = 12 l/min

Total volume is 50 l, time required to fill is:

• 50/12 = 4 2/12 = 4 1/6 min or 4 min 10 sec