please answer number 7,8,9
Attachments:
Answers
Answered by
1
Q.7. A:B=2:3.........(1)
B:C=5:6.........(2)
or 2b=3a (cross multiplication ).......by (1)
5c=6b.......by(2)
b=5c/6
Now putting in (1)
3a=2×5c/6
3a=5c/3
9a=5c
Therefore ratio = 9:5
Q.8. 3×4×5=60
Now , 60/3=20
60/4=15
60/5=12
Therefore ratio= 20:15:12.
B:C=5:6.........(2)
or 2b=3a (cross multiplication ).......by (1)
5c=6b.......by(2)
b=5c/6
Now putting in (1)
3a=2×5c/6
3a=5c/3
9a=5c
Therefore ratio = 9:5
Q.8. 3×4×5=60
Now , 60/3=20
60/4=15
60/5=12
Therefore ratio= 20:15:12.
Similar questions