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Ram measured the length of a curved line...

Ram measured the length of a curved line using a thread. He made a right angled triangle, of base 10 cm and height 20 cm, with the same thread. Find the length of the curved line measured by him.

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The correct Answer is:
52.3 cm
Hypotenuse = `sqrt(100+400)=sqrt(500) = 10 sqrt(5) cm`
Length of the curved line = 10 + 20 + 10 `sqrt(5)` = 52.3 cm
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