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The marked price of watch was Rs. 820. A man bought the same for Rs. 570.72 after getting two successive discounts was -

112%
213%
315%
418%

Answer:- 4

Explanation:-

Solution:

Let the second discount rate be x%.
Then,
(100 - x)% of 80% of 820 = 570.72

$\eqalign{ & \Rightarrow \frac{{\left( {100 - x} \right)}}{{100}} \times \frac{{80}}{{100}} \times 820 = 570.72. \cr & \Rightarrow \left( {100 - x} \right) = \left( {\frac{{57072}}{{8 \times 82}}} \right) = 87 \cr & \Rightarrow x = 13. \cr}$ ∴ Second discount rate = 13%

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∴ Second discount rate = 13% ", "dateCreated": "7/24/2019 10:09:12 AM", "author": { "@type": "Person", "name": "Nitin Sir" } }, "suggestedAnswer": { "@type": "Answer", "text": "

Solution:

Let the second discount rate be x%.
Then,
(100 - x)% of 80% of 820 = 570.72

$\eqalign{ & \Rightarrow \frac{{\left( {100 - x} \right)}}{{100}} \times \frac{{80}}{{100}} \times 820 = 570.72. \cr & \Rightarrow \left( {100 - x} \right) = \left( {\frac{{57072}}{{8 \times 82}}} \right) = 87 \cr & \Rightarrow x = 13. \cr}$ ∴ Second discount rate = 13% ", "dateCreated": "7/24/2019 10:09:12 AM" } }

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