Question #3f1af

1 Answer
Pallu · Kushagra
Oct 10, 2017

Diameter # D= 7cm#

Explanation:

Length of wire is 22 cm. That means the circumference is 22 cm.

Circumference is given by #2 pi r#

#2 pi r = 22# cm where #r# is radius of the circle.

# 2\times 22/7 \times r = 22#cm

#44/7 \times r =22#cm

#r = 22\times 7/ 44# cm

#r = cancel22^1\times 7/ cancel44^2# cm

# r = 7/2# cm

We know

#diameter = 2\times radius#

#D = 2\times 7/2# cm

#D = cancel2\times 7/cancel2# cm

#therefore# Diameter # D= 7cm#

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