A 70" TV is advertised on sale at a local store. What are the length and width of the television?

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A 70" TV is advertised on sale at a local store. What are the length and width of the television?

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Answer 1 · 2017-04-04T01:18:31

Standard TV has got aspect ratio #4:3#. This means its screen has ratio of length and width as #4:3#. A 70" TV has length of the diagonal 70".
Let its length be #4x#" and wudth be #3x#"

So its diagonal #sqrt((4x)^2+(3x)^2)"=5x#"

So #5x=70#

#=>x=14#"

Hence length #4x=4*14=56#"

width #=3x=3*14=42#"

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A 70" TV is advertised on sale at a local store. What are the length and width of the television?

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