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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 8

If the selling price of 10 rulers is the same as the cost price of 15 rulers, then find the profit percentage - Mathematics

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Question

If the selling price of 10 rulers is the same as the cost price of 15 rulers, then find the profit percentage

Sum
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Solution

Let cost price of one ruler be x

Given that selling price (S.P) of 10 rulers

i.e., same as cost price (C.P) of 15 rulers

∴ S.P of 10 rulers = 15 × x = 15x

∴ S.P of 1 ruler = `(15x)/10` = 1.5x

∴ Gain = S.P of 1 ruler – C.P of 1 ruler

= 1.5x – x = 0.5x

Gain % = `"Gain"/"C.P" xx 100`

= `(0.5x)/x xx 100`

 = 50%

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Chapter 4: Life Mathematics - Exercise 4.2 [Page 131]

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Samacheer Kalvi Mathematics [English] Class 8 TN Board
Chapter 4 Life Mathematics
Exercise 4.2 | Q 4 | Page 131
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