Question

Reuben is making a replica of the US flag for his school project.
He uses a scale of 0.5 centimeter to 1 inch to draw the flag. The length of the scale drawing is 2.5 centimeters, and its width is 4.75 centimeters.

The perimeter of the scale drawing is____ centimeters.

The perimeter of the actual flag is____ inches.

Answer 1

a) The perimeter is twice the sum of length and width.
.. 2*(2.5 cm +4.75 cm) = 14.5 cm

b) (1 in)/(0.5 cm) = (flag perimeter)/(14.5 cm)
.. (14.5 cm)*(1 in)/(.5 cm) = flag perimeter
.. flag perimeter = 29 in