Question

Julie had three wheels from bikes and things that she stacked against the shed. Each wheel fitted so neatly together that Julie took this photo. The radius of the largest sheet is 16 cm and the radius of the middle-sized wheel is 9cm. What is the radius of Julie’s smallest wheel?

Answer 1

the answer will be 2 cm

Explanation:

As the difference between 1st and 2nd wheel's radius is 7 cm

16cm-9cm= 7cm

therefore the difference between the middle-wheel and smallest wheel also should be 7 cm, lets assume smallest wheel radius = x

9cm-x= 7cm

x=9-7

x= 2 cm