If a/b = 3/4 and a/c = 5, what is is b/c?
2007-08-05 05:13:33 · 10 answers · asked by Marriot_Plum23 1 in Science & Mathematics ➔ Mathematics
edit: a/b / a/c = c/b = 3/4 / 5/1 = 3/20 => b/c = 20/3
20/3
2007-08-05 05:18:12 · answer #1 · answered by ZK 1 · 2⤊ 0⤋
b/c =5/1 = 5
since a/b=3/4
b = 4.
a/c = 5/1 = 5
c = 1
2007-08-05 12:16:57 · answer #2 · answered by ppp 1 · 0⤊ 2⤋
To make it easier for me, I'd like to multiply a/b by 10 and say a/b = 30/40. Now we need a "c" such that a/c... now 30/c = 5. If "c" = 6 it will work. So, b/c is 40/6 or 20/3.
OR: a/c = 5. So a = 5c. Now: 5c/b = 3/4. Cross multiply to get 3b = 20 c, b/c = 20/3.
2007-08-05 12:27:33 · answer #3 · answered by Richard S 6 · 0⤊ 0⤋
(a/c) / (a/b) = (b/c) = 5/(3/4) = 20/3
2007-08-05 12:22:41 · answer #4 · answered by Captain Mephisto 7 · 1⤊ 0⤋
a/b = 3/4 implies b/a = 4/3
a/c = 5
Therefore
b/c = (b / a) * (a / c)
= (4/3) * 5
= 20/3
2007-08-05 12:28:34 · answer #5 · answered by JRay 2 · 0⤊ 0⤋
a/b=3/4 then a=3 b=4
and if a/c =5 then 3/c=5
then 3=5c then c=3/5
then b/c gives 4 divided by 3/5
or 4times 5/3= 20/3
2007-08-05 12:24:27 · answer #6 · answered by sexy joker 6 · 0⤊ 0⤋
1st equation:
a/b = 3/4
a = 3/4b
2nd equation:
a/c = 5
a = 5c
1st & 2nd equation:
3/4b = 5c
b = 5c / (3/4)
b = 5c * 4/3
b = 20/3c
b/c = 20/3 or 6 2/3
Answer: b/c = 6 2/3
2007-08-09 12:03:47 · answer #7 · answered by Jun Agruda 7 · 2⤊ 0⤋
a/b = 3/4
a/c = 5
so, b/c = (a/c) / (a/b) = 5 / (3/4) = (5*4) / 3 = 20 / 3 = 6.666...
so, ans.--------- b/c = 20/3 or 6.666....
2007-08-05 12:23:02 · answer #8 · answered by sharbadeb 2 · 1⤊ 0⤋
if a/b=3/4, then 4a=3b or b=4a/3
if a/c=5, then a=5c
so, b/c = (4a/3) / 5c
=4a/3(5c)
=20ac/3
=20(5c)c/3
=100c^2/3
2007-08-05 12:22:15 · answer #9 · answered by cidyah 7 · 0⤊ 1⤋
b=a4/3
c=a/5
b/c=a4/3/a/5
b/c=a4/3*5/a
b/c=20/3
b/c=6 2/3
2007-08-05 12:22:38 · answer #10 · answered by pepot 2 · 0⤊ 0⤋