Diameter 4078

What is the diameter of the wheel when it turns 455 times per 1 km? They rounded to the nearest cm.

Correct answer:

D =  70 cm

Step-by-step explanation:

o = π⋅ D n=455 s=1 km→ m=1⋅ 1000  m=1000 m  o=s/n=1000/455=91200​≐2.1978 m D1​=o/π=2.1978/3.1416≐0.6996 m  D=D1​→ cm=D1​⋅ 100  cm=0.6996⋅ 100  cm=70 cm=70 cm

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