maths2題...
2017/06/21 07:11
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maths2題...
1)Calvin sold a car at $212500& has a loss of $37500.Find the % loss. 2)if 1/x : 1/y : 1/z = 9 : 2 : 5 , find x : y : z .
最佳解答:
1. The cost of the car = 212 500 + 37 500 = $250 000 The percentage loss = loss / cost X 100% = 37 500 / 250 000 X 100% = 15% 2. 1/x : 1/y : 1/z = 9 : 2 : 5 x : y : z = 1/9 : 1/2 : 1/5 = 1/9 X 90 : 1/2 X 90 : 1/5 X 90 (通分母) = 10 : 45 : 18
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maths2題...
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發問:1)Calvin sold a car at $212500& has a loss of $37500.Find the % loss. 2)if 1/x : 1/y : 1/z = 9 : 2 : 5 , find x : y : z .
最佳解答:
1. The cost of the car = 212 500 + 37 500 = $250 000 The percentage loss = loss / cost X 100% = 37 500 / 250 000 X 100% = 15% 2. 1/x : 1/y : 1/z = 9 : 2 : 5 x : y : z = 1/9 : 1/2 : 1/5 = 1/9 X 90 : 1/2 X 90 : 1/5 X 90 (通分母) = 10 : 45 : 18
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