The answer is 63.75
hope it helps
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N(20/100)(20/100)=20
400n/10000=20
400n=200000
n=500
Everything it's on the picture
We know, 1 inch = 1/12 feet
so, 5151 inch = 5151 * 1/12 = 429.5
So, your final answer is 429.5
Hope this helps!