Question

Josh wants to add a model of a tree to his model railroad layout. How big should the model tree be if the actual tree is 315 inches and the scale factor is 1:90?

Answer 1

The model tree will be `3.5` inches high.

Explanation:

You can use direct proportion for this as the model and the real tree represent similar figures with their dimensions being in the same ratio as the scale given.

`"model"/"real tree" = 1/90 = x /315`

`x = 315/90`

`x= 3.5` inches