Dimensions definition

Marie has a small copy of Rene margrittes famous painting. The Schoolmasters. Her copy has dimensions of 2 inches by 1.5 inches. The scale of her copy is 1 inch:40 cm What is the dimensions of the original painting?

Every 1 inch on her copy is the same as 40 cm on the original.

You just have to multiply by 40 and convert to centimetres.

2 x 40 = 80

1.5 x 40 = 60

So the original painting is:

80cm by 60cm