A photographic negative 35mm long and 24mm
wide is to be enlarge to make a picture 28.8 cm long.find the width of the picture?
3.5/28.8 = 2.4/x
Cross multiply and solve for x.
A photographic negative 24mm wide and 35 mm long is enlarged to make a picture 12cm wide, how long is the enlarged picture
To find the width of the picture, we can use the concept of ratios and proportions.
Given:
Length of photographic negative: 35mm
Width of photographic negative: 24mm
Length of the enlarged picture: 28.8cm
First, let's convert the length of the enlarged picture into millimeters (since the dimensions of the photographic negative are given in millimeters):
1 cm = 10 mm
So, 28.8 cm = 28.8 x 10 mm = 288 mm
Now, we can set up a proportion to find the width of the picture.
Width of photographic negative / Length of photographic negative = Width of the picture / Length of the picture
Substituting the given values:
24mm / 35mm = Width of the picture / 288mm
To find the width of the picture, we can cross-multiply and solve for it:
24mm * 288mm = 35mm * Width of the picture
6912mm = 35mm * Width of the picture
Dividing both sides by 35mm:
Width of the picture = 6912mm / 35mm
Simplifying:
Width of the picture = 197.49mm (rounded to two decimal places)
Therefore, the width of the picture is approximately 197.49mm.
To find the width of the picture, we can use the concept of ratios.
First, let's find the ratio between the length of the negative and the length of the picture after enlargement:
ratio = length of the picture after enlargement / length of the negative
Given that the length of the negative is 35mm and the length of the picture after enlargement is 28.8 cm, we need to convert the units so they match. Since 1 cm = 10 mm, the length of the picture after enlargement in mm is 28.8 cm * 10 mm/cm = 288 mm.
Now, we can set up the ratio:
ratio = 288 mm / 35 mm
To find the width of the picture, we can use the same ratio. Let's call the width of the picture "w":
ratio = width of the picture / width of the negative
We know the ratio is the same because the negative and the picture enlarge proportionally. Substituting the values we know:
288 mm / 35 mm = w / 24 mm
To find "w", we cross-multiply and solve for "w":
w = 24 mm * (288 mm / 35 mm)
w = 24 mm * 8.2286
w = 197.48 mm
So, the width of the picture is approximately 197.48 mm.