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The cost of a toy telephone is the same as cost of 4 balls. Express the statement as a linear equation in two variables. Also, find the cost of getting 2 toy telephones packed, if cost of 1 ball is ₹ 5 and there is a fixed cost of ₹ 2 for packing a toy telephone.

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x = 4 y

, ₹ 44

x = 4 y

, ₹ 22

x = 2 y

, ₹ 44

x = 2 y

, ₹ 22

answer is A.

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Detailed Solution

Given the cost of a toy telephone = cost of 4 balls.
Fixed cost for packing a toy telephone = ₹ 2.
Let x represents the cost of a toy telephone and y represents the cost of ball.

⇒

x = 4 y

∵ the cost of a toy telephone is the same as cost of 4 balls

Given that, cost of 1 ball is ₹5,

⇒ y = 5

x = 4 y x = 4 × 5 x = 20

The cost of getting 1 toy telephones packed = ₹20 + ₹ 2 = ₹ 22.
Total cost of getting 2 toy telephones packed = 2

×

₹22 = ₹44.
Therefore,

x = 4 y

is the linear equation in two variables and the cost of getting 2 toy telephones packed is ₹44.
Hence, option (1) is correct.

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