Question

The cost of pencil is rupees 3. what is the cost of 10 such pencils. what is the cost of 20 such pencils? Are the number of pencils and total cost in proportion?What is the constant of proportionality?​

Answer 1

Answer:

Hi mate nice to meet you

HERE is your answer

Given,

The cost of 1pencil is Rs. 3

Then cost of 10pencils is 10*3=30/-

The cost of 20pencils is 3*20=60/-

Yes they are in proportion

3:30 =1:10

3:60 =1:20

HOPE THIS HELPED YOU DEAR

Answer 2

Step-by-step explanation:

cost of 1 pencil is Rs3

cost of 10pencils=3*10=30

cost of 20 pencils=3*20=60

therefore the number of pencils and total

cost are in proportion

the constant proportion is 10