Answer:
26 inches
Step-by-step explanation:
The bike tire moves 136 feet in 20 revolutions.
The tire is shaped as a circle. 1 revolution is equivalent to going round the circumference 1 time, hence, the circumference of the bike tire is:
136/20 = 6.8 feet
The circumference of a circle is given as:
C = πD
=> D = C / π
Therefore, the diameter of the bike tire is:
D = 6.8 / 3.14 = 2.17 feet
To convert to inches:
1 feet = 12 inches
2.17 feet = 2.17 * 12 = 26.04 inches ≅ 26 inches
