Mahesh sells a laptop to Shyam at a profit of 10%. Shyam sells Keshav to him at a profit of 12%. Keshav sells the laptop to Sheetal at a profit of 15%. By what percentage has the laptop price increased?
महेश , श्याम को 10 % के लाभ पर एक लैपटॉप बेचता है । श्याम , केशव को 12 % के लाभ पर उसे बेच देता है । केशव लैपटॉप को 15 % के लाभ पर शीतल को बेच देता है । लैपटॉप के मूल्य में कितने प्रतिशत कि वृद्धि हुई है ?
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Let cost price of laptop be Rs. x
∴ Profit =
100
15x
Rs
∴ selling price =Rs(
100
15x
+x)=Rs.
100
115x
New selling price =Rs. (
100
115x
−
100
115x
×
100
10
)
=Rs.
100
115x
(
100
90
)
=Rs.
1000
1035x
∴ Profit =(
1000
1035x
−x)=Rs.
1000
35x
Now,
1000
35x
=1050
∴ x=30,000
∴ Cost price of Laptop =Rs. 30,000
Answered By=shreyash. .......
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