Question

A bicycle wheel makes 5000 revolution in 11 km . find the circumfrence and diameter of the wheel

Answer 1

5000 revolutions=11000 m
1 revolution=11000/5000 m
circumference=11/5 m
2πr=11/5
πd=11/5
22/7×d=11/5
d=11×7/(5×22)
d=11×7/110
d=7/10 m
d=0.7 m
d=0.7×100 cm
d=70 cm

Answer 2

Hi friend,

Here is your answer,
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11 km = 11000 m
5000 revolutions = 11000 m
1 revolution = ¹¹⁰⁰⁰/₅₀₀₀
                   = ¹¹/₅
1 revolution = Circumference
2πr = ¹¹/₅
²*²²/₇*r = ¹¹/₅
r = ¹¹*⁷/₂₂₀
r = ⁷/₂₀
r = 0.35 m
  = 35 cm
d = 0.7 m
   = 70 cm
Circumference = ¹¹/₅ = 2.2 m = 220 cm
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