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

The interest rate that gives money is \( 10 \% \). At this rate, 1000 Birr will be doubled no matter how many years it is deposited in the bank

QUESTION 2 Boitumelo invests an amount of R28 000 for a period of 7 years. For the first two 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. \( 2.2 \quad \begin{array}{l}\text { Convert an interest rate of } 10 \% \text { p.a. compounded quarterly to an annual effective (3) } \\ \text { interest rate. }\end{array} \) \( 2.3 \quad \begin{array}{l}\text { A lawnmower was traded in for R236 after } 10 \text { years. The depreciation was } \\ \text { calculated at } 9.2 \% \text { p.a. on a straight-line basis. } \\ \text { Determine the cost of the lawnmower } 10 \text { years ago. }\end{array} \)

Boitumelo invests an amount of R28 000 for a period of 7 years. For the first two 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. .3 Convert an interest rate of \( 10 \% \) p.a. compounded quarterly to an annual effective (3) interest rate.

How would you describe the amount of investment income and wealth typically generated by low-risk investments? (A) The amount of income and wealth generated is stable. (B) The amount of income and wealth generated is low. (C) The amount of income and wealth generated is high. (D) The amount of income and wealth generated is high and volatile.

A, B को 600 रु. 2 वर्षों के लिए एवं C की 150 रु. 4 वर्षों के लिए उधार देता है तथा \( A^{\prime} \) दोनों से एक साथ 90 रु. साधारण ब्यांज के रूप में प्राप्त करता है। ब्याज की दर ज्ञात करें। \( \begin{array}{ll}\text { (1) } 5 \% & \text { (2) } 3 \% \\ \text { (3) } 6 \% & \text { (4) } 7 \%\end{array} \)