Question

The circumference of a wheel is 9 m 75 dm and it turns 4 times per second. Find
the time taken by the wheel to cover 390 Km.​

Answer 1

Answer:

5909.1 seconds

Step-by-step explanation:

Let us convert the units first

Distance to be covered-390,000m

circumference of the wheel-9+7.5=16.5m

Distance covered in one second = 4*16.5=66m

(because the wheel turns four times per second)

Now required time will be

Total distance/distance covered in one second

i.e. Time,t= 390000/66

- t= 5909.1 seconds(rounded off)

Or time =5909.1/3600 hrs

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