Verified answer

Answer:

To find the cost price of the toy, we can use the formula:

Cost Price = Selling Price / (1 + Profit Percentage)

Given that the selling price is 400 and the profit percentage is 11 1/9 percent, we first need to convert the percentage to a decimal.

11 1/9 percent can be written as 11.11 percent or 11.11/100 in decimal form, which is 0.1111.

Now we can substitute the values into the formula:

Cost Price = 400 / (1 + 0.1111)

Cost Price = 400 / 1.1111

Cost Price ≈ 360.04

Therefore, the cost price of the toy is approximately 360.04.

Explanation:

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[tex]Sum \: of interior \: angles \: of \: \\ a \: triangle = 180°[/tex]

[tex]∠ A+ ∠B + ∠C = 180° \\ \\ 50° + 30° + ∠ C= 180° \\ \\ 80 ° + ∠C = 180° \\ \\ ∠ = 180° - 80° \\ \\ ∠C = 100°[/tex]