The diameter of a bicycle wheel is 50 cm. How many complete rotations does it make over a distance of 3km?
Mathematics · High School · Mon Jan 18 2021
llm
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since radius of bicycle wheel is 50 cm
radius(r)=diameter/2
=50/2
=25 cm
=0.25m (since 1 m=100cm)
1km=1000m
1 revolution=Circumference of wheel
=2×pi×r
=2×0.25×22÷7
=0.5×3.14
=1.57m
No. of revolutions =Total Distance/circumference
=3000/1.57
=1910.83 revolutions
complete rotations= 1911