A TV has a length of 80 cm and a width of 50 cm. If the border is 5 cm thick, the area of the screen is .

2800 c m^{2}

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2400 c m^{2}

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2100 c m^{2}

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4000 c m^{2}

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Solution

The correct option is A $2800 c m^{2}$

The length of the screen is 80 - (5 + 5) = 80 - 10 = 70 cm.
The width of the screen is 50 - (5 + 5) = 50 - 10 = 40 cm
The area of the screen is $70 \times 40 = 2800 c m^{2}$

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A TV has a length of 80 cm and a width of 50 cm. If the border is 5 cm thick, the area of the screen is .

The correct option is A 2800 cm2 The length of the screen is 80 - (5 + 5) = 80 - 10 = 70 cm. The width of the screen is 50 - (5 + 5) = 50 - 10 = 40 cm The area of the screen is 70×40=2800cm2

The correct option is A $2800 c m^{2}$

The length of the screen is 80 - (5 + 5) = 80 - 10 = 70 cm.
The width of the screen is 50 - (5 + 5) = 50 - 10 = 40 cm
The area of the screen is $70 \times 40 = 2800 c m^{2}$