R is 4 if I'm wrong sorry
Try <span>38.465cm I'm not good at math but its the best I could do
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There are 5 "parts" and 3 "parts"; which total "8 parts" (5 + 3 = 8); so, each part must be 56/8 = 7. so each part must be 56/7 = 8
<span>5 x 7 is 35</span>
<span>3 x 7 is 21 </span>
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So the answer is 35:21 .