Four pens cost $2 work out the cost of :
A) 1 pen
B) 3 pens
C) 10 pens
The cost of two cups is $3. Work out the cost of :
A) 1 cup of coffee
B) 5 cups of coffee
C) 7 cups of coffee
Answers
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1
A) 1 pen=$2/4=0.5$
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Answer:
The cost of four pens cost $2 then cost of 1 pen is 2/4 = $ 0.5
A) 1 Pen = $ 0.5
B) 3 Pens = 3 * 0.5 = $ 1.5
C) 10 Pens = 10 * 0.5 = $ 5
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The cost of two cups is $3 then cost of 1 cup is 3/2 = $ 1.5
A) 1 Cup = $ 1.5
B) 5 Cups = 5 * 1.5 = $ 7.5
C) 7 Cups = 7 * 1.5 = $ 10.5
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By using method of cross multiplication:
1) 4 pens = $2
1 pen = X
4X = 2*1
X = 2/4 = 0.5
2) 2 cups = $3
1 cup = X
2X = 3*1
X = 3/2 = 1.5
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