Question

. The ratio of third proportional to

12 and 30 and the mean proportional

between 9 and 25 is

a. 2 :1

b. 5 :1

c. 7 :15

d. 9 :14
​

Answer 1

Answer:

answer is 5:1

Step-by-step explanation:

so now third proportional to 12 and 30 is

30×30=12×3rd proportional

=900÷12=75

now mean proportional between 9 and 25 is

25×9=225=15×15

so ans is 15

now ratio 75/15=5/1