Homework Help

If A:B=3 and B:C=6:7, find A:B:C and A:C

user profile pic

manaswiniayal... | Student, Grade 10 | eNoter

Posted May 24, 2012 at 3:53 PM via web

dislike 1 like

If A:B=3 and B:C=6:7, find A:B:C and A:C

2 Answers | Add Yours

user profile pic

justaguide | College Teacher | (Level 2) Distinguished Educator

Posted May 24, 2012 at 4:13 PM (Answer #1)

dislike 2 like

A:B = 3:1 and B:C = 6:7

A/B = 3

=> A = 3B

B/C = 6/7

=> C = (7B)/6

A:B:C = 3 : 1: 7/6 = 18 : 6 : 7

A: C = 3 : 7/6 = 18 : 7

The ratio A:B:C = 18 : 6 : 7 and A: C = 18 : 7

user profile pic

crazynitin998 | Student , Grade 10 | Salutatorian

Posted May 25, 2012 at 12:37 PM (Answer #2)

dislike 1 like

A:B=3:1

B:C=6:7

A:B:C = 3 : 1: 7/6 = 18 : 6 : 7

A:C= A/B * B/C = 3/1*6/7

= 18/7

= 18:7

 

 

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes