Question

I gathered the required amount so that I have the required amount to buy the book (marked at Rs 200) and a chocolate. But when I went to the store the next day, the price of the book was up by 15%. I had Rs 210 with me. What is the amount I require, on top of the money I already have, to buy the book alone?

• A. Rs 15
• B. Rs 45
• C. Rs 30
• D. Rs 20

Answer 1

The correct option is D Rs 20

The price of the book was Rs 200

The price went up by 15%. Hence, the increase in price of the book is $\frac{15}{100}\times 200=Rs30$

The new price of the book is Rs 200 + Rs 30 = Rs 230.

The amount I have is Rs 210

Hence, the amount I require to buy the book is 230 - 210 = Rs 20.