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The radius of a wheel is 7 cm. In covering 44 km, how many revolutions will it make?

  • Maths - ,

    N = 44,000 m/(2*pi*0.07 m)
    = 100,000 (rounded to 4 sig. figures)

  • Maths - ,

    C = pi * d
    C = 3.14 * 14
    C = 43.96 cm = 0.4396 meters

    1 km = 1000 m

    Take it from there.

  • Maths - ,

    circumference = 2 * pi * r
    = 2 * 22/7 * 7
    = 44 cm
    1 km = 1,00,000 cm
    44 km = 44,00,000 cm
    revolutions to be made =
    44,00,000/44
    = 1,00,000

  • Maths - ,

    C = 2 * pi * r
    = 2 * 22/7 * 7
    = 44 cm
    1 km = 1,00,000 cm
    44 km = 44,00,000 cm
    revolutions to be made =
    44,00,000/44
    = 1,00,000

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