Example 19 Chapter 8 Comparing Quantities - Maths Class 7th - NCERT | RBSE CBSE

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Class 7 Math EXERCISE 8.2 Chapter 8
EXAMPLE 19. Selling price of a toy car is Rs 540. If the profit made by shopkeeper is 20%, what is the cost price of this toy?
कक्षा 7 गणित अभ्यास 8.2 अध्याय 8
उदाहरण 19. एक खिलौना कार का विक्रय मूल्य 540 रुपये है। यदि दुकानदार द्वारा अर्जित लाभ 20% है, तो इस खिलौने का क्रय मूल्य क्या है?

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In 2nd way why only with you 100 why not with other? plz tell me 🙏🙏

peeyushlatamishra