Wayne borrowed money to purchase his son's hockey equipment. He made month-end loan payments of \( \$ 45 \) for two years on a loan that charges interest at \( 8.2 \% \) compounded monthly. Roberto also borrowed money to purchase his daughter's hockey equipment. He made loan payments of \( \$ 132 \) at the end of each quarter for two years on a loan that charges interest at \( 7.5 \% \) compounded quarterly. What was the cash price of each of the sets of hockey equipment, and which parent paid less? The cash price for Wayne's son's hockey equipment is \( \$ \square \).

A, B को 600 रु. 2 वर्बों के लिए वर्षो के लिए उधार देता है तथा A' दोनों से एक साथ 90 रु. साधारण ब्यांज के रूप में प्राप्त करता है। ब्याज की दर ज्ञात करें। \( \begin{array}{ll}\text { (1) } 5 \% & \text { (2) } 3 \% \\ \text { (3) } 6 \% & \text { (4) } 7 \%\end{array} \) क निक्नित धन को साधारण ब्याज की एक निश्चित दत

121. A shopkeeper advertises for selling cloth at \( 4 \% \) loss. However, by using a false metre scale he actually gains \( 20 \% \). What is the actual length of the scale? \( \begin{array}{ll}\text { (R.R.B., } 2006 \text { ) } \\ \begin{array}{ll}\text { (a) } 70 \mathrm{~cm} & \text { (b) } 75 \mathrm{~cm} \\ \text { (c) } 80 \mathrm{~cm} & \text { (d) } 90 \mathrm{~cm}\end{array} \\ \text { 122. Instead of a metre scale, a cloth merchant uses a } \\ 120 \mathrm{~cm} \text { scale while buying but uses an } 80 \mathrm{~cm} \text { scale } \\ \text { while selling the same cloth. If he offers a discount } \\ \text { of } 20 \% \text { on cash payment what is his overall profit } \\ \text { percentage? } \\ \begin{array}{ll}\text { (a) } 15 \% & \text { (b) } 20 \% \\ \text { (c) } 25 \% & \text { (d) } 40 \%\end{array} \\ \text { gain percentage but actually earns } 37 \frac{1}{2} \% \text { profit by } \\ \text { using false weight. If for a kg he uses a weight of } \\ 800 \text { gm, what is the nominal gain percentage at } \\ \text { which he claims to be selling his goods? } \\ \begin{array}{ll}\text { (a) } 8 \% & \text { (b) } 10 \% \\ \text { (c) } 15 \% & \text { (d) } 20 \%\end{array}\end{array} \).

8. The rule \( V_{n}=6000 \times 1.09^{n} \) could be used to model which of the following scenarios? A. An investment of \( \$ 6000 \) with an interest rate of \( 0.09 \% \) p.a, compounding monthly. B. An investment of \( \$ 6000 \) with an interest rate of \( 0.09 \% \) p.a, compounding quarterly. C. An investment of \( \$ 6000 \) with an interest rate of \( 9 \% \) p.a, compounding monthly. D. An investment of \( \$ 6000 \) with an interest rate of \( 9 \% \) p.a, compounding annually. 9. Find the final value of each of the following investments, compounding yearly, correct to the nearest cent. a. \( \$ 120 \) invested for three years with compound interest of \( 5 \% \) per annum. b. \( \$ 9000000 \) invested in a compound interest account for five years at \( 8.2 \% \) per annum. c. \( \$ 230000 \) invested in a compound interest account for twenty years at \( 2.31 \% \) per annum.

कोई धन \( 7 \% \) की दर से 4.5 गुणा होने में कितना समय लगेगा। a) 40 साल b) 50 साल c) 35 साल d) 42 साल

Boitumelo invests an amount of R28 000 for a period of 7 years. For the first two (3) years the interest was \( 12 \% \) p.a. compounded semi-annually. The interest was then changed to \( 10 \% \) p.a. compounded quarterly. Determine the value of the investment after the 7 -year period.