Question

If a wheel's radius is 7m and it revolved 100 times. What is the distance covered by it?

Answer 1

perimeter of the wheel=$2 \pi r=14 \pi$
the distance covered=700(14)(3.14159)=30787.6 m

Answer 2

perimeter of wheel is =2πr=14π
in one revolution it covers a distance of 14π m
therefore in 100 revolution distance covered by wheel =100 x 14 x 3.14
                                                                            =4398.229.. m ans......