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The correct answer:
D) College
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The answer is b, 5 degrees. The equation means that the temperature will be 61.4 degrees + 5 degrees each hour until 4 pm.
<h2>Given :-</h2>
- Cost of school exercise book was Rs. 10
- Now , she had to pay Rs. 12 for it .
<h2>To Find :-</h2>
- The increase percentage of price of that book .
<h2>Solution :-</h2>


<u>According</u><u> </u><u>to</u><u> </u><u>the question</u><u>, </u>
→ Increase of Price = ( Rs. 12 - Rs. 10 )
⇒ Rs. 2
→ Initial Value = Rs. 10
Let's solve by putting the values in the formula !

⇝2×10%
⇝20%
∴ The percent of increase in price of that school exercise book is 20 %