The diameter of a bicycle wheel is 50cm. How may complete rotations does it make over a distance of 1km?
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Answered by
8
since radius of bicycle wheel is 50 cm,
Therefore, radius(r)=diameter/2
=50/2
=25 cm
=0.25m(since 1 m=100cm)
1km=1000m
Sistance covered in 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
=1000/1.57
=636.94 revolutions
Answered by
2
Diameter = 50cm
Radius = 25cm (half of diameter)
1km = 1000m × 100cm = 100000cm
Circumference of bicycle = 2πr
= 2 × 22/7 × 25
= 1100/7
Complete rotations= Total distance/Circumference
= 100000 × 7 / 1100
= 700000/1100
= 636.3636363(approx)
No. of complete rotations = 636.
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