Umm, No Answer?

[Nick F40]

I have just finished my PSSAs in school, I know, THANK GOD! But today when I was doing my math section I came apon a question that had me puzzled. I told my teacher and he said he wasn't sure, he also couldn't give me the answer anyways, but he said he will ask. I hope you guys don't think this is a pointless post, I really am confused.

Question:

An airplane is flying at an average speed of 575 mph. It flew 2,570 miles and used 15,200 gallons of fuel. What is the approximation to the average number of gallons per hour?

Answers"

A. 80

B. 105

C. 300

D. 679

[evilone]

divide the amount of gas used by the amout the plain traveled

that should give you the answer bro

[Nick F40]

Ok, that's 5.9 something, now do you see that answer?

[Aaronw]

I believe you will find they forgot a zero in their answers. Distance / speed = 4.46 hours, 15200 gallons / 4.46 hours = 3400 gallons per hour (+/-). C is probably the correct answer assuming it should have been 3000.

Makes you wonder how accurate the over all test is if they made a mistake like that? How many did you just not catch or will never know because they show the wrong answer being correct.

The school should ask for its money back from the test writing company.

[Olle F]

2,570 miles at 575 mph should take 2,570/575 = 4.47 hours. The fuel consumption per hour should be 15,200/4.47 = 3400 gal/h. Now I'm puzzled too...

Edit: Seems like Aaron got the same number as I did... I guess something in the test isn't right.

Edited April 9, 2008 by Olle F

[Nick F40]

I believe you will find they forgot a zero in their answers. Distance / speed = 4.46 hours, 15200 gallons / 4.46 hours = 3400 gallons per hour (+/-). C is probably the correct answer assuming it should have been 3000.

Makes you wonder how accurate the over all test is if they made a mistake like that? How many did you just not catch or will never know because they show the wrong answer being correct.

The school should ask for its money back from the test writing company.

I am not sure but I know a couple. That's what I thought, it is a weird thing.

2,570 miles at 575 mph should take 2,570/575 = 4.47 hours. The fuel consumption per hour should be 15,200/4.47 = 3400 gal/h. Now I'm puzzled too...

Edit: Seems like Aaron got the same number as I did... I guess something in the test isn't right.

ya I know, I got that, I'm pretty sure, but another kid was helping me on that and he just yells, "this is bs!"

[m408]

I have just finished my PSSAs in school, I know, THANK GOD! But today when I was doing my math section I came apon a question that had me puzzled. I told my teacher and he said he wasn't sure, he also couldn't give me the answer anyways, but he said he will ask. I hope you guys don't think this is a pointless post, I really am confused.

Question:

An airplane is flying at an average speed of 575 mph. It flew 2,570 miles and used 15,200 gallons of fuel. What is the approximation to the average number of gallons per hour?

Answers"

A. 80

B. 105

C. 300

D. 679

None of the above. 3378 gph

[Nick F40]

Well, I did answer C, that's what they tell you. I hope that they just forgot to add a couple of 0's.

I hate government controlled tests!

[Olle F]

Well, I did answer C, that's what they tell you. I hope that they just forgot to add a couple of 0's.

I hate government controlled tests!

Oh, it's a government controlled test? Maybe they just want to see if you're a good citizen and answers "c" without questioning why.

[notfastenuff]

I don't know if they're trying to be the least bit realistic on this or not, but here's another thought. (remember, I don't know jack about how fast planes fly) A gallon a fuel weighs app. 6 pounds. 15200 gallons of fuel would come out to 91200 lbs. of fuel. That seems like an astronomical amount of weight. I'm wondering if they got carried away with the 0s, and it's supposed to be 1500 gallons. With that line of thinking, the approximate answer becomes C: 300. Just a thought.

[CAL]

I don't know if they're trying to be the least bit realistic on this or not, but here's another thought. (remember, I don't know jack about how fast planes fly) A gallon a fuel weighs app. 6 pounds. 15200 gallons of fuel would come out to 91200 lbs. of fuel. That seems like an astronomical amount of weight. I'm wondering if they got carried away with the 0s, and it's supposed to be 1500 gallons. With that line of thinking, the approximate answer becomes C: 300. Just a thought.

I don't know, An AN-225 Mriya MTOW is 1.3 million pounds.

[Mal.au]

Hi Guys

Just call my 12 year old in to have a look as they are doing some problem solving in math at school

He took one look at it and said it can't be any of those answers it would have to be a 4 digit answer, with those figures he is right, I think the extra zero is in the fuel capacity

Mal

[Nick F40]

Mal, thanks for your son confirming that, I apreciate it.

Like I said, I was confuzzled, I figured it was C, that it was a 0 missing. The lbs does seem wrong.

[Aaronw]

A 747 can carry a fuel load of 48,000 to 64,000 gallons of fuel (varies depending on which version of 747). The 747 has a cruising speed of 555 to 570 miles per hour, so is realistically a contender for the aircraft in the question.

A proposed 747 firefighting air tanker was developed that can carry 24,000 gallons of retardant (at 12 lbs per gallon), the DC10 air tanker in limited use carries 12,000 gallons of retardant.

It's possible that the fuel consumption, had an extra zero but it could just as easily be the answer is missing one. Regardless I'd say there is a zero goofing off.

[Nick F40]

someone forgot to revise!