1) A shopkeeper buys 300 identical articles at a price that is \( 20 \% \) above the cost price. Each of the remaining articles is sold at a price of that \( 50 \% \) of each of the 260 articles. Express the shopkeeper profit as a percentage of his cost prices. 2) Find the compound interest when \( \$ 500 \) for 2 years a 3 per annum compound yearly. 3) Devi uses a clinometer to measure the height of a tred \( \mathrm{TO}_{4} \mathrm{~F} \% \mathrm{~m} \) where she stands, the angle of elevation of the tree is 40 and the height of the tree calculate to be \( 18.4 \mathrm{~m} \). Given that the clinometer is \( 1.6 \mathrm{~m} \) above the ground. Find the distance \( A B \) between Devi and the foot of tree. 4) A survey is conducted to find out the average number of books that the students in a class read in a month. The bar graph shows the results of the survey.
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This means that the shopkeeper pays 120% of the cost price for each article. Let's say the cost price of each article is $x. Then the shopkeeper pays 120% of $x, which is $1.2x, for each article. The total cost price for 300 articles is 300 * $1.2x = Show more…
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