Question

the cost of 21 pencils is rs 63 what is the cost of 12 pencils
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Answer 1

Given :  the cost of 21 pencils is rs 63

To Find :  the cost of 12 pencils

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Solution:

cost of 21 pencils is rs 63

=> Cost of 1 pencil   = 63/21

=> Cost of 1 pencil   =   Rs 3

=> Cost of 12 pencils = 12 * 3

=>  Cost of 12 pencils = Rs 36

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Answer 2

The cost of 21 pencils = Rs. 63

The cost of 1 pencil = 63 ÷ 21 = Rs. 3

The cost of 12 pencils = 12 × 3 = 36

So, The cost of 12 pencils = Rs. 36

Hope it's help you