Question

If 4pencils cost ₹ 28, then the cost of 7 pencils is :​

Answer 1

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

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Answer 2

Step-by-step explanation:

4pencils cost ₹28

so 1 pencil cost 28/4=₹7

then 7 pencils cost= 7×7=₹49