The real treehouse should be 126 centimeters tall.
Given that two students make a model of a treehouse they want to build, and the scale is 1:42, and in the scale model the treehouse store is 3 cm tall, to determine how tall should the real tree house store be the following cross multiplication should be done:
- 1 = 3
- 42 = X
- (42 x 3) / 1 = X
- 126 / 1 = X
- 126 = X
Therefore, the real treehouse should be 126 centimeters tall.
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