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तामिळनाडू बोर्ड ऑफ सेकेंडरी एज्युकेशनएस.एस.एल.सी. (इंग्रजी माध्यम) इयत्ता ८

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

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

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