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A person needs 120000 yuan to buy a commercial house with an area of 100 square meters. He has paid 30000 yuan in the down payment. The rest of the money he needs is a mortgage loan from the bank. The loan lasts for 10 years and the annual interest rate is 2.5% (not considering compound interest). How much is the actual value per square meter of his house? (loan interest = loan amount × annual interest rate × time)
Loan = 12-3 = 90000
Therefore, the interest is 9 * 2.5% * 10 = 9 / 40000 yuan
So the total purchase price is 12 + 9 / 4 = 142500 yuan
Therefore, the unit price of buying a house per square meter is 142500 / 100 = 1425 yuan
1. Xiaoning deposits 3000 yuan into the bank with a monthly interest rate of 0.3%. If she withdraws it half a year later, how many yuan can she get back the principal and after tax interest?
2. Lan Lan deposits 350 yuan into the bank (two-year term of lump sum deposit and withdrawal), with an annual interest rate of 4.68%. What is the interest tax when she withdraws it?
3. Boss Wang deposits 5000 yuan into the bank, deposits and withdraws it in lump sum for three years, with an annual interest rate of 5.40%. After maturity, boss Wang donates the after tax interest to hope project. How much yuan does boss Wang donate to hope project?
4. Li Ming has 1000 yuan and plans to deposit it in the bank for two years. If he deposits it for one year, the annual interest rate is 4.14%. When it matures in the first year, he combines the principal with the after tax interest, and deposits it for another year. When it matures in the second year, how many yuan are the principal and after tax interest he gets? (the number should be kept to two decimal places)
5. Mr. Li has deposited a sum of money in the bank. He has fixed term lump sum deposit and lump sum withdrawal for two years. The annual interest rate is 4.68%. After two years, he gets the after tax interest of 311.22 yuan. How many yuan has Mr. Li saved?
6. Xiao Xu has 27 coins of 2-cent and 5-cent, with a face value of 90 cents in total. How many coins are there in 2-cent and 5-cent
1. 3000 + 3000 * 0.3% * 6 = 3054 yuan in half a year, and the principal and after tax interest can be recovered, totaling 3054 yuan 2, 350 * 4.68% * 2 = 32.76 yuan. When she took out, the interest tax was 32.76 yuan 3, 5000 * 5.40% * 3 = 810 yuan. Boss Wang donated 810 yuan 4, 1000 * (1 + 4.14%) * (1 + 4.14%) = 1084.51 yuan to hope project
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