Question

in a school of 1600 students the ratio of teacher to students is 1:16
some teachers join the school and the ratio changes to 3:40
how many teachers joined the school?

Answer 1

Answer:

20 teachers

Step-by-step explanation:

we know that

1:16 = 100 teachers for 1600 students.

3:40=3x÷40x=40x= 1600

x=1600/40

x=40

therefore 3x:40x= 3×40:40×40

=120:1600

before there were 100 teachers for 1600 students

now 120 teacher are there for 1600 students

so 20 teachers are joined

Answer 2

Hey there!!☺☺

Total number of students in the school = 1600

Teacher : student = 1:16 = 100: 1600

New ratio = 3:40 = 120: 1600

The number of teachers joined the school = 120 - 100 = 20

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Priyoshi❤❤