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Standard IX

Mathematics

Linear Equation in Two Variables

IF 6 kg of su...

Question

IF 6 kg of sugar and 5 kg of tea together cost RS.209 and 4 kg of sugar and 3 kg of tea together cost RS. 131. then the cost of 1 kg sugar and 1 kg tea are respectovely

RS. 11 and RS. 25

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RS.12 and RS. 20

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RS.14 and RS.20

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RS. 14 and RS.25

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Solution

The correct option is B RS.12 and RS. 20
Let cost of 1 kg sugar is x and cost of 1 kg tea is y
Then 6x+5y=209 ....(i)
and 4x+3y=131 ....(ii)
Solving equations (i) and (ii) we get
x=14 and y=25

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IF 6 kg of sugar and 5 kg of tea together cost RS.209 and 4 kg of sugar and 3 kg of tea together cost RS. 131. then the cost of 1 kg sugar and 1 kg tea are respectovely

The correct option is B RS.12 and RS. 20Let cost of 1 kg sugar is x and cost of 1 kg tea is yThen 6x+5y=209 ....(i)and 4x+3y=131 ....(ii)Solving equations (i) and (ii) we getx=14 and y=25

The correct option is B RS.12 and RS. 20
Let cost of 1 kg sugar is x and cost of 1 kg tea is y
Then 6x+5y=209 ....(i)
and 4x+3y=131 ....(ii)
Solving equations (i) and (ii) we get
x=14 and y=25