On a blueprint, the length of a wall is 5 centimeters. If the actual length of the wall is 15 feet, what is the scale of the blueprint?
A.1 cm=2ft
B. 1 cm=3ft
C. 1 cm=5ft
D. 1 ft=3cm
B. 1 cm=3ft
To find the scale of the blueprint, we need to compare the length on the blueprint to the actual length. Since the length on the blueprint is 5 cm and the actual length is 15 feet, we can set up a ratio:
5 cm / 15 ft = x cm / 1 ft
Cross multiply to solve for x:
5 ft * x = 15 cm
5x = 15
x = 3
Therefore, the scale of the blueprint is 1 cm = 3 ft.