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Answer:
18.75
Step-by-step explanation:
I GOT THIS QUESTION TOO I ACCIDENTALLY PUT THE WRONG ANSWER BUT THE ANSWER IS TOOK HALF IF 16=8
AND TOOK HALF OF 20=10 THAN I TAKE 10x15=150 THAN I
DIVIED WITH 8 WHICH IS [ ANSWER: 18.75 cm ] I THINK ITS RIGHT!!