Question

In a school there are 40 teachers and 1600 students. Find the teacher student ratio
A pen costs 20 rs and a bag costs 80. What is the ratio of pen and bag.​

Answer 1

Answer:

40 : 1600 = 1 : 40 is the answer

20 : 80 = 1 : 4 is the answer

Answer 2

Given total cost of 5 pens and 10 pencil = Rs 30

5 pens + 10 pencils = 30

pens + 2 pencils = 1

also given pen cost 3 more than a pencil

i.e, pen = 3 + pencil.

pen - pencil = 3

pens + 2 pencils = 6

_______________

-3 pencils = -3

pencils = 1

pen - 1 = 3

pen = 4

cost of pencils = 1 cost of pen = 4