2022 · Q90
A bicycle wheel of radius 35 cm makes n revolutions in moving 11 km. what is the value of n? (Take π =(22)/(7))
Elementary MathematicsCircles
- A500
- B1000
- C2500
- D5000
Explanation
One revolution covers the circumference 2*pi*r = 2*(22/7)*35 = 220 cm = 2.2 m. For 11 km = 11,000 m, the number of revolutions is n = 11,000/2.2 = 5000. Hence option (d).