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You have a 4x6 photograph that you would like to have enlarged. If the desired new width it 6 inches what should the length be?
You have a 4x6 photograph that you would like to have enlarged. If the desired new width it 6 inches what should the length be?
Solution. The original photograph 4x6 with ratio width:length=4:6. So, if the desired new width it 6 inches, and we assume the the desired new length is x, then we have
4:6=6:x
i.e.,
4x=6*6=36
So, x=36/4=9 (inches)
So, the new length should be 9 inches.
Note: 4:6 means that 4/6