Answer:
240 cm by 288 cm
Explanation:
You want the dimensions of a 150 cm by 180 cm poster enlarged by the ratio 8:5.
Solution
The enlargement ratio, expressed as a fraction, multiplies each of the original dimensions to get the new dimensions. The new dimensions are ...
(8/5)·150 cm by (8/5)·180 cm = 240 cm by 288 cm