122. Instead of a metre scale, a cloth merchant uses a 120 cm scale while buying but uses an 80 cm scale while selling the same cloth. If he offers a discount of \( 20 \% \) on cash payment what is his overall profit percentage? \( \begin{array}{ll}\text { (a) } 15 \% & \text { (b) } 20 \% \\ \text { (c) } 25 \% & \text { (d) } 40 \%\end{array} \)

51. एक आदमी 5000 रू. की धनराशि का कुछ भाग \( 4 \% \) तथा शेष \( 5 \% \) की साधारण ब्याज दर पर उधार देता है। उसे 2 वर्ष्षों के बाद कुल ब्याज 440 रू. मिलता है। उपरोक्त दरों में से प्रत्येक पर लगाई गई राशि का अनुपात बताए- \( \begin{array}{ll}\text { (1) } 4: 5 & \text { (2) } 3: 2 \\ \text { (3) } 5: 4 & \text { (4) } 2: 3\end{array} \)

A company was penalized by the government act for low quality production. If the company has 3 share holders Umer, Usman \& Furqan investing in the ratios of \( 2: 3: 4 \) and the amount of penalty is Rs. \( 456,845,67 \). Find the amount of penalty paid by each of 3 share holders.

(b) A two-storey car park has a total of 1020 parking spaces. At \( 06: 30 \) hours one morning, \( \frac{1}{30} \) of the 1020 spaces are filled. During the next hour, no cars left the car park but another \( \frac{4}{15} \) of the 1020 spaces are filled. Determine the number of parking spaces that are NOT filled at \( 07: 30 \) hours. (c) \( \begin{array}{l}\text { Of the } 1020 \\ \text { the top level? }\end{array} \)

अलग-अलुग कीमतों वाले दो तटह के दूध \( 2: 3 \) अनुपात कें किलाए जाते हैं। यदि पहले दूध की कीमत रूपये/लीटर तथा दूसटे दूध की कीमत 15 रूपये/लीटर तो मिश्रण का औसत मूल्य (प्रति लीटर) ज्ञात करें?

In a school Auditorium, there are three types of rows arrangements possible for watching programs: rows of 20 students per row, or rows of 25 students per row, or rows of 40 students per row. Find the least number of students required for any one of these arrangements so that all the students can be accommodated in each of these arrangements.