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What is the surface area of a television $20$ inches long, $15$ inches wide and $5$ inches high?

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980 {in}^{2}

950 {in}^{2}

915 {in}^{2}

925 {in}^{2}

answer is B.

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Detailed Solution

Given that, the dimension of television are as follows,
Length= 20 in
Breadth =15 in
Height= 5 in
The formula for the surface area of the cuboid having length, breadth and height as

l, b

and

h

respectively is given as

2 (lb + bh + hl)

.
So, after substituting the value of all the dimensions in the formula we get,

\Rightarrow 2 \times (20 \times 15 + 20 \times 5 + 15 \times 5)

\Rightarrow 2 \times (300 + 100 + 75)

\Rightarrow 2 \times 475

\Rightarrow 950 {in}^{2}

Therefore, the surface area of television is

950 {in}^{2} .

Hence option (2) is correct.

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