Two tanks: 600 gallons capacity at 50% full and 400 gallons capacity at 80% full. What is total fuel on hand?

Two tanks: 600 gallons capacity at 50% full and 400 gallons capacity at 80% full. What is total fuel on hand?

• A. 980 gallons
• B. 620 gallons
• C. 300 gallons
• D. 400 gallons

Answer: (B)

The main idea is to find how much fuel is in each tank by applying its fill percentage to its capacity, then add the results. First tank: 600 gallons capacity at 50% = 600 × 0.50 = 300 gallons. Second tank: 400 gallons capacity at 80% = 400 × 0.80 = 320 gallons. Total fuel on hand = 300 + 320 = 620 gallons. So the combined fuel on hand is 620 gallons. The other numbers come from either using full capacity or mixing up the percentages, which isn’t the case here.

The main idea is to find how much fuel is in each tank by applying its fill percentage to its capacity, then add the results.

First tank: 600 gallons capacity at 50% = 600 × 0.50 = 300 gallons.

Second tank: 400 gallons capacity at 80% = 400 × 0.80 = 320 gallons.

Total fuel on hand = 300 + 320 = 620 gallons.

So the combined fuel on hand is 620 gallons. The other numbers come from either using full capacity or mixing up the percentages, which isn’t the case here.