Question

33.A sales tax of 6 of the cost of a car was added to the purchase price of Birr 60,000. What is
the total cost of the car including sales tax?
34.A shop keeper buys a pair of shoes for Birr 180 and sells it for Birr 225. What is the percentage profit?
35.A rabbit hutch costs Birr 29 plus VAT at: 15. What is the total cost including VAT?
36. An article which cost Birr 150 was sold at a loss of 5. What was the selling price?
37.A trader bought 40 shirts for Birr 220 and sold them at Birr 27 each. Did he gain or loss
percentage? Find the percentage loss or profit accordingly
38.Shop keeper M sells some goods to N and makes a profit of 15. N resells to P at a loss of 5. If
P pays Birr 13.11 how much did M pay for the goods?
39.A profit of 24 was made when a book was sold for Birr 34.10, find the selling price that
would have given a profit of 28.
40.Find the simple interest on a. Birr 300 for 3 years at 5 b. Birr 525.00 for 4 years at 3.
c. Birr 750 for 3 years and 4 moths at. d. 750 dollars for years at 3.
41. If the simple interest on a sum of money invested at 3 per annum for 44 years is Birr 420,
find the principal.
so simple​

Answer 1

If P be the printed price of a commodity, the rate of sales tax be r% and S be the selling price then


S=P(1+\dfrac{r}{100}) and Sales Tax=

S-P= \dfrac{P \times r}{100}
This is the formula
I hope you understand
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