Question

a driving wheel of locomotive engine is 2.1 m in radius find the distance covered when it has made 8000 resvolutions.

Answer 1

the answer is. 105600m

Answer 2

circumfrence of wheel =2πr
                                    =2×(22/7)×2.1
                                    =2×22×0.3
                                    =13.2 m
Distance covered in 8000 revolutions=8000×13.2
                                                           =105600 m
                                                           =105.6 km

The car covers 105.6 km when the wheel rotates 8000 times