1. May bought 30boxes of cosmetics at $3600. She found that 5boxes were expired. If she sold out the remaining at $180 per box, find the profit per cent of this trade.
2. A hawker sold 1500 pieces of key chains at a loss of 20%. He lost a total of $6000. Find the cost price of each key chain.
3. Kay borrows $36000 from a bank at 3.75% p.a. simple interest. If she has to return a total amount of $45450, how long does she borrow?
[15分] Maths Questions (Profit and loss) 要列明步驟 =]
2007-08-16 6:17 pm
回答 (1)
2007-08-16 6:50 pm
✔ 最佳答案
1.May gets = (30-5)*180 = $4500
Profit = 4500-3600 = 900
Profit percent = 900/3600 = 0.25
= 25%
2.
Let x be the cost of each key chain,
1500*x*20% = 6000
0.2x = 4
x = 20
Cost of each key chain = $20
3.
Let x be the time for Kay borrow the money,
36000 + 36000*(3.75%)x = 45450
36000*(0.0375)x = 9450
x = 7
Kay borrow the money for 7 years.
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