Question

any one knows this answer with full explanation please its urgent​

Answer 1

Answer:

20 teachers

Step-by-step explanation:

Ratio of teachers to students = 3:60

                                                = 1:20

Despite increase of values in students the ratio must remain constant.

Let no. of teachers = x

Then,

x/400 = 1/20

x = 400/20

∴x=20 teachers

Answer 2

Answer:

9:20

Step-by-step explanation:

thats your answer