Question

5 pencil cost $ 6 and a dozen pencils of the same type cost $14.40. is the cost of the pencil proportionate to the number of pencils? solve using the method of proportion.​

Answer 1

Step-by-step explanation:

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

solution

Answer 2

Answer:

Cost of 5 pencils is 6 rupees

So cost of 1 pencil is 6/5

Cost of 12 pencils is 14.40 rupees

So cost of one pencil is 14.40/12

' =6/5

Since the cost of one pencil remains the same,hence no.of pencils is propotionate to cost

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