Two students make a model of a tree house they want to build. The scale is 1:42. In the scale model, the door is 3 cm tall. How tall should the real tree house door be?

The real tree house door should be 126 cm tall.

Explanation:

Given: Two students make a model of a tree house they want to build. The scale is 1:42.

i.e. 1 cm of model = 42 cm in real

if the in the scale model,the door is 3 cm tall, then the height of real tree house door  = 3  x (42) cm

⇒ Height of real tree house door=  126 cm

Hence, the real tree house door should be 126 cm tall.

h20 and c02

explanation:

i believe that if you say you can, you cant and if you say you can't your right. i believe i can do anything i set my mind to. i've applied this with my everyday life. it me get motivated to do stuff.for example, i apply this to do school. if i believe i can finish a whole class in a couple of week's i will be motivated to do the class until i finish it, and if i believe i can't, i will get distracted and do other stuff besides doing my work. it changed me by believing i can accomplish anything i set my mind to.