Question

the driving wheel of an engine is 80 cm in radius. if it makes 280 revolutions per minute find the speed of engine in km per hr (take π = 22/7)​

Answer 1

Answer:

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

Step-by-step explanation:

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