An empty fuel tank of a car was filled with A type petrol.when the tank was half empty,it wass filled with B type petrol.again when the tank was half-empty,it was filled with A type petrol.when the tank was half empty again,it was filled with B type petrol.what is the percentage of A type petrol at present in the tank?
2006-08-21 15:54:29 · 8 answers · asked by sudhish n 1 in Science & Mathematics ➔ Mathematics
It cannot be half empty only half full
2006-08-21 16:00:51 · answer #1 · answered by Bohemian 4 · 0⤊ 0⤋
25% A
2006-08-21 16:04:46 · answer #2 · answered by MathMinded 2 · 0⤊ 0⤋
First filling of the tank: 1 A
Second refilling: 0.5A + 0.5B
Third refilling (0.25A + 0.25B) +0.5A = 0.75A +0.25B
Final refilling (0.375A +0.125B) +0.5B=0.375A+0.626B
The percentage of type A fuel currently is 37.5%
(Assumed that at the time of refilling, two types of gasoline mix homogeneously and are consumed in the same proportion).
2006-08-21 16:08:18 · answer #3 · answered by rgsoni 2 · 0⤊ 0⤋
25%
2006-08-21 17:24:06 · answer #4 · answered by pokefan5443098 1 · 0⤊ 0⤋
4 total fills.
At end of first fill, 100% is A.
At end of second fill, 50% is A, 50% is B.
At end of third fill, 75% is A, 25% is B.
At end of fourth fill, 37.5% is A, 62.5% is B.
2006-08-21 18:00:58 · answer #5 · answered by jimbob 6 · 0⤊ 0⤋
It is one quarter type A since it was half and then halved again.
2006-08-21 16:01:06 · answer #6 · answered by Rich Z 7 · 0⤊ 0⤋
At each filling:
All A
1/2A + 1/2B
1/4A + 1/4B + 1/2A
1/8A + 1/8B + 1/4A + 1/2B
so it has 1/8A + 1/4A = 3/8A = .375A or 37.5% A
Doug
2006-08-21 16:06:39 · answer #7 · answered by doug_donaghue 7 · 0⤊ 0⤋
i dunno abt the math.. but 1 thing i noe is, by the time you fill in the diffirent kind of petrol, ur engine will be gone.. ; )...........
2006-08-21 16:20:36 · answer #8 · answered by Anonymous · 0⤊ 0⤋