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A challenge to all math expertsFollow me if you love such challenging questions as I keep on asking such questions to check the mindsets of the mathematicians r class=

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mhanifa

Answer:

20

Step-by-step explanation:

Refer to attached

Imagine the rod cut and opened to make a rectangle with sides of 4 and 12

As the string goes 4 times, the length of the rod is divided by 4 parts of

  • 12/4=3

We have triangle of sides 3 and 4, therefore the long side is 5

The length of the string is:

  • 5*4 = 20
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