the cost of 21 pencils is rs 63 what is the cost of 12 pencils
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Given : the cost of 21 pencils is rs 63
To Find : the cost of 12 pencils
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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the cost price of a box and pen is rs80.the box is sold at 10% profit ...
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1
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
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