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Percentage question24

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24. The cost of making a table is calculated as follows:Wood………………$400 Metal………………$200 Paint……………….$ 50 Labour……………..$250 Total: $900 Now, the cost of wood is increased by 28%, that of metal is increased by 25%, that of paint is decreased by 10% and that of labour is increased by 50%.(a) What is the... 顯示更多 24. The cost of making a table is calculated as follows: Wood………………$400 Metal………………$200 Paint……………….$ 50 Labour……………..$250 Total: $900 Now, the cost of wood is increased by 28%, that of metal is increased by 25%, that of paint is decreased by 10% and that of labour is increased by 50%.(a) What is the new cost of a table?(b) What is the percentage increase in the cost of a table?

最佳解答:

Wood $400 X 1.28 = $512 Metal $200 X 1.25 = $250 Paint $50 X 0.90 = $45 Labour $250 X 1.50 = $375 Total = $1,182.00

其他解答:

a) The new cost is $1,182.00 Wood $400 X 1.28 = $512 Metal $200 X 1.25 = $250 Paint $50 X 0.90 = $45 Labour $250 X 1.50 = $375 Total = $1,182.00 b) 1,182 / 900 = 1.313333 =31.3333333333% or =31 1/3 %|||||Initial costs of table = 400+200+50+250 = 900 Increment as follows : - Wood = 400 x 128% = 512 Metal = 200 x 125% = 250 Paint = 50 x 90% = 45 Labour = 250 x 150% = 375 (a) New Costs = 512+250+45+375 = 1182 (b) Increase of costs of table = (1182 - 900)/900 x 100 = 282/900 x 100 = 31.33%

 

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