Question

The student-teacher ratio in a school is 45:2. if there are 4050 students in the school,
how many teachers are there in the school?​

Answer 1

Answer:

180

Step-by-step explanation:

45/2 = 22.5

4050/22.5 = 180

Answer 2

Let, the common factor of the ratio be 'x'

So, the number of students =(45*x)

                                            = 45x

The number of teacher =(x*2)

                                     =2x

By condition,

$45x=4050\\or, x = 4050/45\\or, x=90$

∴ x= 90

∴ The number o teachers =(90*2)

                                        = 180