Question

a piece of a wire is in the form of a rectangle 8.9 cm long and 5.4 cm wide is reshaped and bent in the form of a circle find the radius of the circle

Answer 1

Hey Sahchitra!

°°Here is your answer °°

The total length of wire will be equal to the perimeter of rectangle.
So, length of wire =
$2(l + b)$
$2(8.9 + 5.4)$
= 28.6cm

Now, the wire is bend to make a circle.
So, the perimeter of circle will be equal to the length of wire.

Perimeter of circle = 28.6
2πr = 28.6
$r \: = \: 28.6 \times \frac{7 }{22} \times \frac{1}{2}$
$r \: = \: 4.55cm$


Here's your answer.



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Thanks.