problem solving help

[vishugogo]

plzz help me in these 3 questions
javascript:emoticon(':mrgreen:')

In 1979 approximately of the 37.3 million airline passengers traveling to or from the United States used Kennedy Airport. If the number of such passengers that used Miami Airport was the number that used Kennedy Airport and 4 times the number that used Logan Airport, approximately how many millions of these passengers used Logan Airport that year?

(A)18.6
(B)9.3
(C)6.2
(D)3.1
(E)1.6

There were 36.000 hardback copies of a certain novel sold before the paperback version was issued. From the time the first paperback copy was sold until the last copy of the novel was sold. 9 times as many paperback copies as hardback copies were sold. If a total of 441.000 copies of the novel were sold in all, how many paperback copies were sold?
iske options hain
(A) 45.000
(B) 360.000
(C) 364.500
(D) 392.000
(E) 396.900


Last year Mrs. Long received $160 in dividends on her shares of Company X stock, all of which she had held for the entire year. If she had had 12 more shares of the stock last year, she would have received $15 more in total annual dividends. How many shares of the stock did she have last year?
(A) 128
(B) 140
(C) 172
(D) 175
(E) 200 :mrgreen:

[Ashujain]

plzz help me in these 3 questions
javascript:emoticon(':mrgreen:')

In 1979 approximately of the 37.3 million airline passengers traveling to or from the United States used Kennedy Airport. If the number of such passengers that used Miami Airport was the number that used Kennedy Airport and 4 times the number that used Logan Airport, approximately how many millions of these passengers used Logan Airport that year?

(A)18.6
(B)9.3
(C)6.2
(D)3.1
(E)1.6

There were 36.000 hardback copies of a certain novel sold before the paperback version was issued. From the time the first paperback copy was sold until the last copy of the novel was sold. 9 times as many paperback copies as hardback copies were sold. If a total of 441.000 copies of the novel were sold in all, how many paperback copies were sold?
iske options hain
(A) 45.000
(B) 360.000
(C) 364.500
(D) 392.000
(E) 396.900


Last year Mrs. Long received $160 in dividends on her shares of Company X stock, all of which she had held for the entire year. If she had had 12 more shares of the stock last year, she would have received $15 more in total annual dividends. How many shares of the stock did she have last year?
(A) 128
(B) 140
(C) 172
(D) 175
(E) 200 :mrgreen:

Solution1: Passenger Miami = Passenger Kennedy = 4* Passenger Logan
Therefore, Passenger Logan = 37.3/4 = 9.3 (approx)
Hence, the answer is B


Solution2: Total no. of novels = Hardback(before the papeback version sold) + Paperback + Hardback (sold alongside paperback version)
441000 = 36000 + 9x + x
10x = 405000 ----> x = 40500
Therefore, Paperback version = 40500*9 = 3645000
Hence, the answer is C


Solution3: If there is an increase of $15 if she had 12 shares more then dividend pr share is 15/12 = 1.25
Therefore, no. of shares for which dividend is $160 are 160/1.25 = 128
Hence, the answer is A