Answer:
36.45 cm
Step-by-step explanation:
You can automatically assume that if it was 20% cut off, Wendy's hair would've been 36 cm. Multiply 45 by 0.19 to get 8.55 since that is how much Wendy's hair is being cut off. Subtract that number from 45 to get your final answer which is 36.45 cm.
Well to find the volume of a pyramid, you take the base (12mm) times the height (15mm) times 1/3 to get an answer of 60mm squared.
Hope this helped.