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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ८

By selling a speaker for ₹ 768, a man loses 20%. In order to gain 20%, how much should he sell the speaker?

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प्रश्न

By selling a speaker for ₹ 768, a man loses 20%. In order to gain 20%, how much should he sell the speaker?

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उत्तर

Selling price (S.P) of speaker = ₹ 768

Loss % = 20%

as per formula

S.P = `"C.P" xx ((10 - "loss"%))/100`

∴ 768 = `"C.P" xx ((100 - 20)/100)`

∴ C.P = `(768 xx 100)/80` = 960

For gain of 20%, we should now calculate the selling price

∴ S.P = `"C.P" xx ((100 + "gain"%)/100)`

= `960((100 + 20)/100)`

= `960 xx 120/100`

= 96 × 12

= ₹ 1152

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अध्याय 4: Life Mathematics - Exercise 4.2 [पृष्ठ १३१]

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सामाचीर कलवी Mathematics [English] Class 8 TN Board
अध्याय 4 Life Mathematics
Exercise 4.2 | Q 6 | पृष्ठ १३१

संबंधित प्रश्न

A retailer buys a radio for Rs 225. His overhead expenses are Rs 15. If he sells the radio for Rs 300, determine his profit percent.


A man sells an article at a profit of 25%. If he had bought it at 20% less and sold it for Rs 36.75 less, he would have gained 30%. Find the cost price of the article.


The cost price and selling price are given in the following table. Find out whether there was a profit or a loss and how much it was.

Cost Price
(in Rs.)
Selling Price
(in Rs)
Profit or Loss How much?
4100 4090    

A shopkeeper purchased 200 bulbs for Rs. 10 each. However, 5 bulbs were fused and had to be thrown away. The remaining were sold at Rs. 12 each. Find the gain or loss %.

A mobile phone is sold for ₹ 8400 at a gain of 20%. The cost price of the mobile phone is ________


If selling an article for ₹ 820 causes 10% loss on the selling price, then find its cost price.


Sultana bought the following things from a general store. Calculate the total bill amount paid by her.

(i) Medicines costing ₹800 with GST at 5%

(ii) Cosmetics costing ₹ 650 with GST at 12%

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Match the entries in Column I with the appropriate entries in Column II:

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(i) 3:5 (A) ₹ 54
(ii) 2.5 (B) ₹ 47
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(L) 0.125
  (M) 3 : 2
  (N) ₹ 164
  (O) 3 : 3

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