a photogragh is 20cm long and 15cm wide.the length of a small print of the photograph is 4cm.find the width of the smaller print
Cross multiply and solve for x.
20/15 = 4/x
To find the width of the smaller print, we can use the concept of proportions.
First, we need to establish a proportion between the dimensions of the original photograph and the dimensions of the small print. We can set up the following ratio:
Original photograph length : Original photograph width = Small print length : Small print width
Therefore, we have:
20 cm : 15 cm = 4 cm : x (unknown width of the small print)
To solve for x, we can cross-multiply and then solve for x:
20 cm * x = 4 cm * 15 cm
Simplifying the equation:
20x = 60
Divide both sides of the equation by 20:
20x/20 = 60/20
x = 3 cm
Therefore, the width of the smaller print is 3 cm.