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Mathematics

Grade-8

Easy

Question

Determine the radius of the penny

59.66 mm
9.5 mm
38 mm
19 mm

hint Hint:

The relation between the radius and diameter of the coin is $r equals d over 2$ .

The correct answer is: 9.5 mm

Step1: The relation between the radius and the diameter of a circle is as follows:
$r equals d over 2$ where r is the radius of the circle and d is the diameter of the circle.
Step2: We are given the diameter of the coin and we need to find the radius of the coin.
given $d equals space 19 space m m$
$r equals d over 2$
=> $r equals 19 over 2$
=> $r equals 9.5 space m m$
So, The radius of the coin is $9.5 space m m$ .

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