Agarage floor measures 150 feet by 120 feet , a scale drawing of the floor on grid paper uses a scale of 1 unit : 15 feet . what are the dimensions of the drawing

150 feet by 120 feet.

15 feet = 1 unit.

150 feet will be:        150 / 15 = 10 units

15 feet = 1 unit.

120 feet will be:        120 / 15 = 8 units

So the measure of 150 feet by 120 feet, will measure 10 units by 8 units on the drawing.

Hope this explains it.

It would be 18 cm